Industry Segment Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment				2
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Fee income		$ 27,577	$ 24,932	$ 80,739	$ 75,201
Interest income	[1]	12,187	11,745	34,920	36,683
Interest expense		287	465	915	1,911
Income (expense)		11,432	10,814	32,588	33,348
Tax-equivalized pre-tax income	[1]	8,446	7,532	26,596	24,282
Goodwill		14,262	14,262	14,262	14,262	$ 14,262
Other intangible assets, net		2,779	3,637	2,779	3,637
Total assets		2,292,986	2,000,463	2,292,986	2,000,463	$ 2,203,235
Average funding sources		1,850,088	1,531,227	1,768,616	1,416,045
Tax equivalent adjustment		468	466	1,417	1,424
Corporate, Eliminations and Other
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Fee income		339	83	1,176	1,197
Interest income	[1]	(361)	(579)	(1,335)	812
Interest expense		0	0	0	0
Income (expense)		(859)	(593)	(2,170)	(1,674)
Tax-equivalized pre-tax income	[1]	(193)	(496)	(654)	2,010
Goodwill		0	0	0	0
Other intangible assets, net		0	0	0	0
Total assets		(5,176)	(10,540)	(5,176)	(10,540)
Average funding sources		0	0	0	0
Information Services
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Fee income		26,642	24,198	77,717	72,098
Interest income	[1]	6,361	5,112	17,754	14,774
Interest expense		0	0	0	0
Tax-equivalized pre-tax income	[1]	6,753	4,522	19,170	13,082
Goodwill		12,433	12,433	12,433	12,433
Other intangible assets, net		431	837	431	837
Total assets		1,018,710	905,158	1,018,710	905,158
Average funding sources		974,091	751,010	906,474	703,142
Information Services | Corporate, Eliminations and Other
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Income (expense)		0	0	0	0
Banking Services
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Fee income		596	651	1,846	1,906
Interest income	[1]	6,187	7,212	18,501	21,097
Interest expense		287	465	915	1,911
Tax-equivalized pre-tax income	[1]	1,886	3,506	8,080	9,190
Goodwill		1,829	1,829	1,829	1,829
Other intangible assets, net		2,348	2,800	2,348	2,800
Total assets		1,279,452	1,105,845	1,279,452	1,105,845
Average funding sources		875,997	780,217	862,142	712,903
Banking Services | Corporate, Eliminations and Other
Interest Income (Expense), after Provision for Loan Loss [Abstract]
Income (expense)		$ (859)	$ (593)	$ (2,170)	$ (1,674)

[1] * Presented on a tax-equivalent basis assuming a tax rate of 21% for both 2021 and 2020. The tax-equivalent adjustment was approximately $468,000 and $466,000 for the Third Quarter of 2021 and 2020, respectively, and $1,417,000 and $1,424,000 for the Nine Months Ended 2021 and 2020, respectively.