Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits - opening balance	$ 21,179	$ 34,301	$ 35,663
Gross increases - tax positions in prior period	503	1,835	13
Gross decreases - tax positions in prior period	0	(106)	(2,152)
Gross increases - current-period tax positions	654	528	896
Settlements with taxing authorities	0	(17)	(119)
FAFC indemnification release	0	(13,147)	0
Expiration of the statute of limitations for the assessment of taxes	(2,011)	(2,215)	0
Unrecognized tax benefits - ending balance	$ 20,325	$ 21,179	$ 34,301