Capitalized Software (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Capitalized Software
Capitalized software costs	$ 132,544,000	$ 135,827,000
Less: accumulated amortization	81,286,000	77,903,000
Total	51,258,000	57,924,000
Capitalized software development costs	29,061,000	33,897,000	42,841,000
Write-off of additional capitalized development initiatives		6,091,000
Reduction in capitalized software costs and related accumulated amortization for fully amortized costs that are no longer in use	32,200,000
Capitalized software costs not subject to amortization	1,300,000	6,500,000
Amortization of capitalized software costs	$ 35,700,000	$ 38,200,000	$ 34,500,000