Input filter not showing because of style="display: none;"

[spanishkangaroo]

I have a table like the following:

<table id="tarjetaTableId" dt:table="true" dt:url="@{/tarjeta}"
                dt:serverSide="true" dt:processing="true"
                dt:pagingType="input">
                <thead>
                    <tr>
                        <th dt:property="tarjetaId">Id</th>
                        <th dt:property="tns">TNS</th>
                        <th dt:property="tfc">Fecha caducidad</th>
                        <th dt:property="tfc" dt:renderFunction="toDate">Fecha
                            caducidad</th>
                    </tr>
                </thead>
            </table>

but the input pagination elements do not appear as the page renders as the following:
<div class="dataTables_paginate paging_input" id="tarjetaTableId_paginate" style="display: none;"><span class="paginate_button first disabled">First</span><span class="paginate_button previous disabled" id="tarjetaTableId_previous">Previous</span><span class="paginate_page">Page </span><input class="paginate_input" type="text"><span class="paginate_of"> of 72842</span><span class="paginate_button next" id="tarjetaTableId_next">Next</span><span class="paginate_button last" id="tarjetaTableId_last">Last</span></div>

I don't know where this style="display: none;" comes from.

Could you please tell why is this happening and how could I make the pagination elements appear?