Provision for Income Tax Schedule (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current tax provision:
Federal	$ 77,671	$ 94,423	$ 39,517
State	8,034	10,046	2,953
Foreign	13,019	18,952	10,193
Deferred tax provision (benefit):
Federal	24,210	(582)	54,980
State	(1,106)	(2,045)	4,413
Foreign	1,869	(3,189)	1,209
Change in valuation allowance	2,370	(3)	(6,974)
Total	$ 126,067	$ 117,602	$ 106,291