Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Rent Expense under Operating Leases

Rent expense under operating leases for the years ended December 31 aggregated (in thousands):

	2016		2015		2014
Rent expense	$	13,652	$	13,959	$	12,290

Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Leases

Future minimum lease payments under these noncancelable operating leases as of December 31, 2016 are as follows (in thousands):

2017	$	11,377
2018	$	9,315
2019	$	6,705
2020	$	3,881
2021	$	2,224
Thereafter	$	2,781