Other Intangible Assets (Additional Disclosures) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Amortization of other intangible assets	$ 2,100,000	$ 2,100,000	$ 2,500,000
Amortization of deferred financing costs	900,000	3,100,000	4,000,000
Reduction in carrying value of deferred financing costs	1,800,000
Remaining unamortized residual value	24,166,000	29,094,000
Impairment loss	0	0	400,000
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization period	20 years
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization period	2 years
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Reduction in capitalized costs	300,000
Gain on sale of certain patent rights	800,000
Pricing Arrangement [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining unamortized residual value			$ 400,000