Industry Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fee revenue and other income:
Income from customers	$ 29,055	$ 27,911	$ 86,685	$ 84,752
Intersegment income (expense)
Net income	6,138	6,092	18,243	17,962
Goodwill	11,590	11,590	11,590	11,590	11,590
Other intangible assets, net	3,342	3,905	3,342	3,905
Total assets	1,329,327	1,391,235	1,329,327	1,391,235	1,287,387
Information Services [Member]
Fee revenue and other income:
Income from customers	23,208	21,727	68,977	66,448
Intersegment income (expense)	(2,408)	2,842	(7,253)	8,126
Net income	4,123	3,725	11,982	11,351
Goodwill	11,454	11,454	11,454	11,454
Other intangible assets, net	3,342	3,905	3,342	3,905
Total assets	679,844	774,476	679,844	774,476
Banking Services [Member]
Fee revenue and other income:
Income from customers	5,847	6,184	17,708	18,304
Intersegment income (expense)	(353)	408	(1,122)	1,251
Net income	2,015	2,367	6,135	6,611
Goodwill	136	136	136	136
Other intangible assets, net
Total assets	663,101	634,564	663,101	634,564
Corporate Eliminations and Other [Member]
Fee revenue and other income:
Income from customers
Intersegment income (expense)	2,761	(3,250)	8,375	(9,377)
Net income			126
Goodwill
Other intangible assets, net
Total assets	$ (13,618)	$ (17,805)	$ (13,618)	$ (17,805)