Operating Segments Revenue (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenues	$ 224,992	$ 295,569	$ 330,942	$ 271,798	$ 203,713	$ 274,897	$ 295,585	$ 226,708	$ 1,123,301	$ 1,000,903	$ 789,695
Footwear [Member]
Segment Reporting Information [Line Items]
Revenues									1,076,210	956,816	753,951
Other Revenue [Member]
Segment Reporting Information [Line Items]
Revenues									47,091	44,087	35,744
United States [Member]
Segment Reporting Information [Line Items]
Revenues									396,121	355,560	299,026
International [Member]
Segment Reporting Information [Line Items]
Revenues									727,180	645,343	490,669
Japan [Member]
Segment Reporting Information [Line Items]
Revenues									$ 164,565	$ 154,925	$ 111,764