Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies [Abstract]

Future Minimum Lease Payments

As of December 31, 2016, future minimum lease payments, by calendar year, are as follows: 

2017	$	26,820
2018		21,528
2019		17,238
2020		14,850
2021		12,280
Thereafter		69,436
	$	162,152

Future Minimum Purchase Commitments

As of December 31, 2016, future minimum purchase commitments, by calendar year, are as follows: 

2017	$	42,640
2018		9,501
	$	52,141