Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings from Continuing Operations before Income Taxes [Abstract]
United States	$ 180,022	$ 192,219	$ 248,357
Foreign	111,890	118,860	114,343
Earnings from continuing operations before income taxes	291,912	311,079	362,700
Current tax expense (benefit):
Federal	53,187	62,858	79,551
State	(3,075)	9,262	16,511
Foreign	21,138	24,452	32,883
Current income tax expense (benefit)	71,250	96,572	128,945
Deferred tax expense (benefit):
Federal	3,194	(5,185)	(10,183)
State	1,887	(993)	(1,571)
Foreign	(9,775)	(1,967)	(2,865)
Deferred income tax expense (benefit)	(4,694)	(8,145)	(14,619)
Total provision	$ 66,556	$ 88,427	$ 114,326