Segment Reporting - Schedule of Assets by Geographic Segments (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Long-lived assets:
Total	$ 266,007	$ 270,203
United States [Member]
Long-lived assets:
Total	202,909	206,822
United Kingdom [Member]
Long-lived assets:
Total	4,025	4,581
Germany [Member]
Long-lived assets:
Total	55,639	55,269
Asia (Including Japan) [Member]
Long-lived assets:
Total	$ 3,434	$ 3,531