Commitments and Contingencies Royalties (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Fiscal Year Maturity [Abstract]
Royalty expense	$ 5,300,000		$ 5,500,000	$ 5,800,000
Royalty Agreements
Fiscal Year Maturity [Abstract]
Fiscal Year 2014	1,105,000
Fiscal Year 2015	1,149,000
Fiscal Year 2016	1,194,000
Fiscal Year 2017	1,239,000
Fiscal Year 2018	1,294,000
Thereafter	1,655,000	[1]
Total minimum royalty commitments	$ 7,636,000

[1] For purposes of the contractual minimum royalty payments table, we have included indefinite-lived contractual minimum royalty payments due in the ten fiscal years following December 31, 2013.