Employee Benefit Plans - Net Gratuity Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 494	$ 401	$ 978	$ 801
Interest cost	166	150	328	299
Expected return on plan assets	(111)	(104)	(218)	(208)
Amortization of Actuarial loss	71	22	140	44
Net gratuity cost	$ 620	$ 469	$ 1,228	$ 936