Industry Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fee revenue and other income:
Income from customers									$ 76,572	$ 71,138	$ 62,824
Intersegment income (expense)
Net interest income (expense) after provision for loan losses:
Income from customers									38,245	40,385	43,711
Intersegment income (expense)
Depreciation and amortization									2,896	2,532	2,062
Income tax expense	1,582	1,533	2,106	2,013	1,607	1,890	2,205	2,185	7,234	7,887	8,497
Net income	5,254	6,138	6,073	6,032	5,341	6,092	5,962	5,908	23,497	23,303	23,009
Goodwill	11,590				11,590				11,590	11,590	7,471
Other intangible assets, net	3,222				3,757				3,222	3,757	161
Total assets	1,326,020				1,287,387				1,326,020	1,287,387	1,319,301
Information Services [Member]
Fee revenue and other income:
Income from customers									75,010	70,376	61,470
Intersegment income (expense)									9,637	9,478	10,088
Net interest income (expense) after provision for loan losses:
Income from customers									15,986	18,547	21,030
Intersegment income (expense)									11	24	17
Depreciation and amortization									2,338	2,392	1,874
Income tax expense									2,232	2,802	3,028
Net income									15,237	15,761	14,716
Goodwill	11,454				11,454				11,454	11,454	7,335
Other intangible assets, net	3,222				3,757				3,222	3,757	161
Total assets	657,604				642,623				657,604	642,623	698,685
Banking Services [Member]
Fee revenue and other income:
Income from customers									1,216	1,272	1,354
Intersegment income (expense)									1,479	1,663	1,859
Net interest income (expense) after provision for loan losses:
Income from customers									22,259	21,838	22,681
Intersegment income (expense)									(11)	(24)	(17)
Depreciation and amortization									143	101	164
Income tax expense									5,002	5,085	5,469
Net income									8,133	8,014	8,293
Goodwill	136				136				136	136	136
Other intangible assets, net
Total assets	679,357				668,648				679,357	668,648	622,996
Corporate Eliminations and Other [Member]
Fee revenue and other income:
Income from customers									346	(510)
Intersegment income (expense)									(11,116)	(11,141)	(11,947)
Net interest income (expense) after provision for loan losses:
Income from customers
Intersegment income (expense)
Depreciation and amortization									115	39	24
Income tax expense
Net income									127	(472)
Goodwill
Other intangible assets, net
Total assets	$ (10,941)				$ (23,884)				$ (10,941)	$ (23,884)	$ (2,380)