Goodwill and Other Intangibles (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012	Dec. 31, 2011
Other Intangible Assets
Gross Carrying Amount	$ 60,045,000		$ 60,045,000			$ 59,420,000
Accumulated Amortization	23,509,000		23,509,000		274,300,000	19,826,000
Indefinite-lived intangibles assets not subject to amortization	8,700,000		8,700,000
Amortization expense of other intangible assets	1,300,000	1,100,000	3,700,000	3,100,000
Trade names
Other Intangible Assets
Gross Carrying Amount	10,400,000		10,400,000			10,400,000
Accumulated Amortization	1,767,000		1,767,000			1,293,000
Useful lives			4 years
Customer related intangibles
Other Intangible Assets
Gross Carrying Amount	27,851,000		27,851,000			27,851,000
Accumulated Amortization	6,158,000		6,158,000			4,497,000
Useful lives			13 years 1 month 6 days
Proprietary software
Other Intangible Assets
Gross Carrying Amount	21,501,000		21,501,000			20,876,000
Accumulated Amortization	15,584,000		15,584,000			14,036,000
Useful lives			6 years 7 months 6 days
Trading rights
Other Intangible Assets
Gross Carrying Amount	243,000		243,000			243,000
Other
Other Intangible Assets
Gross Carrying Amount	50,000		50,000			50,000
POSIT trade name
Other Intangible Assets
Indefinite-lived intangibles assets not subject to amortization	$ 8,400,000		$ 8,400,000