Income Taxes (Components of the Provision for Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 51,389	$ 81,019	$ 50,022
Foreign	37,221	30,059	29,169
State	11,605	17,395	11,905
Total current	100,215	128,473	91,096
Deferred:
Federal	(34,897)	(64,960)	(8,631)
Foreign	(8,413)	1,409	(4,792)
State	(8,538)	(7,240)	(2,806)
Total deferred	(51,848)	(70,791)	(16,229)
Total provision	$ 48,367	$ 57,682	$ 74,867