How to hide custom filter textbox on responsive mode?

Hi,
I have below code with custom filter textbox in header, but on responsive mode textbox filters are not disappears, only header title set to display none. Please help!!

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.15/css/dataTables.bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/responsive/2.1.1/css/responsive.bootstrap.min.css">

<script src="//code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://cdn.datatables.net/1.10.15/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.15/js/dataTables.bootstrap.min.js"></script>
<script src="https://cdn.datatables.net/responsive/2.1.1/js/dataTables.responsive.min.js"></script>
<script src="https://cdn.datatables.net/responsive/2.1.1/js/responsive.bootstrap.min.js"></script>

  <script>
        $(document).ready(function () {

            // Setup - add a text input to each footer cell
            $('#example thead tr:eq(1) th').each(function () {
                var title = $('#example thead tr:eq(0) th').eq($(this).index()).text();
                $(this).html('<input type="text" placeholder="Search ' + title + '" />');
            });

            var table = $('#example').DataTable({
                "orderCellsTop": true,
                "responsive": true,
                "columnDefs": [
                                { "responsivePriority": 1, "targets": 0 },
                                { "responsivePriority": 2, "targets": -1 }
                                ]
            });

            //// Apply the search
            table.columns().every(function (index) {
                $('#example thead tr:eq(1) th:eq(' + index + ') input').on('keyup change', function () {
                    table.column($(this).parent().index() + ':visible')
                        .search(this.value)
                        .draw();
                });
            });

        })

    </script>

 <table id="example" class="table table-striped table-bordered dt-responsive nowrap" cellspacing="0" width="100%">
            <thead>
                <tr>
                    <th>First name</th>
                    <th>Last name</th>
                    <th>Position</th>
                    <th>Office</th>
                    <th>Age</th>
                    <th>Start date</th>
                    <th>Salary</th>
                    <th>Extn.</th>
                    <th>E-mail</th>
                </tr>
                <tr>
                    <th>First name</th>
                    <th>Last name</th>
                    <th>Position</th>
                    <th>Office</th>
                    <th>Age</th>
                    <th>Start date</th>
                    <th>Salary</th>
                    <th>Extn.</th>
                    <th>E-mail</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td>Tiger</td>
                    <td>Nixon</td>
                    <td>System Architect</td>
                    <td>Edinburgh</td>
                    <td>61</td>
                    <td>2011/04/25</td>
                    <td>$320,800</td>
                    <td>5421</td>
                    <td>t.nixon@datatables.net</td>
                </tr>
                <tr>
                    <td>Garrett</td>
                    <td>Winters</td>
                    <td>Accountant</td>
                    <td>Tokyo</td>
                    <td>63</td>
                    <td>2011/07/25</td>
                    <td>$170,750</td>
                    <td>8422</td>
                    <td>g.winters@datatables.net</td>
                </tr>
                <tr>
                    <td>Ashton</td>
                    <td>Cox</td>
                    <td>Junior Technical Author</td>
                    <td>San Francisco</td>
                    <td>66</td>
                    <td>2009/01/12</td>
                    <td>$86,000</td>
                    <td>1562</td>
                    <td>a.cox@datatables.net</td>
                </tr>
                <tr>
                    <td>Cedric</td>
                    <td>Kelly</td>
                    <td>Senior Javascript Developer</td>
                    <td>Edinburgh</td>
                    <td>22</td>
                    <td>2012/03/29</td>
                    <td>$433,060</td>
                    <td>6224</td>
                    <td>c.kelly@datatables.net</td>
                </tr>
                <tr>
                    <td>Airi</td>
                    <td>Satou</td>
                    <td>Accountant</td>
                    <td>Tokyo</td>
                    <td>33</td>
                    <td>2008/11/28</td>
                    <td>$162,700</td>
                    <td>5407</td>
                    <td>a.satou@datatables.net</td>
                </tr>
            </tbody>
        </table>