Intangibles (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Other Intangible Assets
Gross Carrying Amount	$ 58,142,000		$ 58,142,000		$ 58,045,000
Accumulated Amortization	29,310,000		29,310,000		26,844,000
Other intangible assets not subject to amortization	8,800,000		8,800,000
Amortization expense of other intangible assets	1,200,000	1,000,000	2,400,000	2,100,000
Impairment of other intangible assets			0
Trade names
Other Intangible Assets
Gross Carrying Amount	8,400,000		8,400,000		8,400,000
Trading rights
Other Intangible Assets
Gross Carrying Amount	340,000		340,000		243,000
Other
Other Intangible Assets
Gross Carrying Amount	50,000		50,000		50,000
POSIT trade name
Other Intangible Assets
Other intangible assets not subject to amortization	8,400,000		8,400,000
Customer related intangibles
Other Intangible Assets
Gross Carrying Amount	27,851,000		27,851,000		27,851,000
Accumulated Amortization	10,035,000		10,035,000		8,923,000
Useful Lives			13 years 1 month 6 days
Proprietary software
Other Intangible Assets
Gross Carrying Amount	21,501,000		21,501,000		21,501,000
Accumulated Amortization	$ 19,275,000		$ 19,275,000		$ 17,921,000
Useful Lives			6 years 4 months 24 days