Industry Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Fee revenue and other income:
Income from customers	$ 29,196	$ 28,407	$ 57,630	$ 56,841
Intersegment income (expense)
Net income	6,073	5,962	12,105	11,870
Goodwill	11,590	11,590	11,590	11,590	11,590
Other intangible assets, net	3,463	4,052	3,463	4,052
Total assets	1,348,534	1,291,260	1,348,534	1,291,260	1,287,387
Information Services [Member]
Fee revenue and other income:
Income from customers	23,309	22,173	45,769	44,721
Intersegment income (expense)	(2,279)	2,744	(4,845)	5,284
Net income	4,166	3,749	7,859	7,626
Goodwill	11,454	11,454	11,454	11,454
Other intangible assets, net	3,463	4,052	3,463	4,052
Total assets	720,841	714,747	720,841	714,747
Banking Services [Member]
Fee revenue and other income:
Income from customers	5,887	6,234	11,861	12,120
Intersegment income (expense)	(386)	415	(769)	843
Net income	1,868	2,213	4,120	4,244
Goodwill	136	136	136	136
Other intangible assets, net
Total assets	641,114	600,553	641,114	600,553
Corporate Eliminations and Other [Member]
Fee revenue and other income:
Income from customers
Intersegment income (expense)	2,665	(3,159)	5,614	(6,127)
Net income	39		126
Goodwill
Other intangible assets, net
Total assets	$ (13,421)	$ (24,040)	$ (13,421)	$ (24,040)