Goodwill and Other Intangibles (Detail 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Other Intangible Assets
Gross Carrying Amount	$ 62,967,000		$ 62,967,000		$ 58,045,000
Accumulated Amortization	30,267,000		30,267,000		26,844,000
Other intangible assets not subject to amortization	8,600,000		8,600,000
Amortization expense of other intangible assets	900,000	1,000,000	3,400,000	3,100,000
Estimate of future amortization expense for acquired other intangibles
Impairment of other intangible assets			0
Trade name
Other Intangible Assets
Gross Carrying Amount	8,552,000		8,552,000		8,400,000
Trading rights
Other Intangible Assets
Gross Carrying Amount	339,000		339,000		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	30,377,000		30,377,000		27,851,000
Accumulated Amortization	10,589,000		10,589,000		8,923,000
Useful Lives			13 years 3 months 18 days
Proprietary software
Other Intangible Assets
Gross Carrying Amount	23,649,000		23,649,000		21,501,000
Accumulated Amortization	$ 19,678,000		$ 19,678,000		$ 17,921,000
Useful Lives			6 years 2 months 12 days