Fixed Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fixed Assets [Abstract]
Land	$ 26,770,000	$ 26,772,000
Buildings and improvements	125,837,000	125,351,000
Furniture and equipment	113,628,000	116,764,000
Capitalized software	123,356,000	113,391,000
Leasehold improvements	7,354,000	6,593,000
Fixed assets, gross	396,945,000	388,871,000
Less accumulated depreciation and amortization	(219,185,000)	(192,366,000)
Fixed assets, net	177,760,000	196,505,000
Depreciation expense	$ 34,300,000	$ 33,900,000	$ 28,900,000