Leases

Rental expense for operating leases was $18.2 million, $18.1 million, and $17.5 million for the years ended December 31, 2016, 2015, and 2014, respectively. Sublease rental income was not material in any of the periods presented.

As of December 31, 2016, our minimum lease payment requirements for noncancelable operating leases with remaining terms of more than one year are as follows (in thousands):



2017	$	15,132
2018	14,697
2019	14,078
2020	13,850
2021	12,881
Thereafter	67,602
Total	$	138,240

These future minimum lease payment requirements have not been reduced by sublease income due in the future under noncancelable subleases. Minimum sublease income expected to be received in the future is not material.