Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total revenues by geographic area
Revenues	$ 702,272	$ 796,213	$ 723,053
United States
Total revenues by geographic area
Revenues	455,418	537,310	509,105
Australia
Total revenues by geographic area
Revenues	6	23	86
Ireland
Total revenues by geographic area
Revenues	139,642	166,739	141,793
Singapore
Total revenues by geographic area
Revenues	106,813	91,816	$ 72,069
China
Total revenues by geographic area
Revenues	$ 393	$ 325