Operating Segments and Related Information (Details 6) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,076,560	$ 1,063,457
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	692,391	666,759
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	369,906	383,501
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 14,263	$ 13,197