Goodwill and Other Intangibles - Other Intangible (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Other Intangible Assets
Gross Carrying Amount	$ 42,473		$ 42,430
Accumulated Amortization	27,398		27,040
Other intangible assets not subject to amortization	8,900
Amortization expense of other intangible assets	343	$ 600
Impairment of other intangible assets	0
Trade name
Other Intangible Assets
Gross Carrying Amount	8,519		8,518
Trading rights
Other Intangible Assets
Gross Carrying Amount	339		339
Other
Other Intangible Assets
Gross Carrying Amount	50		50
POSIT trade name
Other Intangible Assets
Other intangible assets not subject to amortization	8,400
Customer related intangibles
Other Intangible Assets
Gross Carrying Amount	10,381		10,358
Accumulated Amortization	$ 5,740		5,584
Useful Lives	17 years
Proprietary software
Other Intangible Assets
Gross Carrying Amount	$ 23,184		23,165
Accumulated Amortization	$ 21,658		$ 21,456
Useful Lives	9 years 4 months 24 days