Income Taxes (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 8,560	$ 8,027	$ 9,321
Tax positions taken during prior periods	1,691	533	9,944
Tax positions taken during the current period	0	0	3,350
Acquisition	598	0	556
Settlements	0	0	(15,144)
Lapse of the applicable statute of limitations	(215)	0	0
Balance at December 31	10,634	8,560	8,027
Interest and penalties	616	0	9,614
The liability for unrecognized tax benefits included accrued interest	$ 1,923	$ 1,031	$ 1,031