Employee Benefit Plans - Schedule of Benefit Obligation, Fair Value of Plan Assets, and Funded Status of our Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Change in Benefit Obligation [Roll Forward]
Service cost	$ 270	$ 305
Interest cost	5,151	5,712
Change in Plan Assets [Roll Forward]
Fair value of plan assets - ending	118,658
Pension Plan, Defined Benefit
Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning	145,019	159,715
Service cost	270	305
Interest cost	5,151	5,712
Actuarial loss (gain)	29,793	(9,043)
Benefits paid	(6,816)	(4,072)
Currency changes	(26,616)	(7,598)
Benefit obligation - ending	146,801	145,019
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	116,386	122,780
Employer contribution	2,105	3,144
Actual return on plan assets	28,422	514
Benefits paid	(6,816)	(4,072)
Currency changes	(21,439)	(5,980)
Fair value of plan assets - ending	118,658	116,386
Underfunded status	$ (28,143)	$ (28,633)