Industry Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Fee revenue and other income:
Fee income		$ 26,175	$ 27,095
Interest income	[1]	11,138	12,822
Interest expense		331	965
Intersegment income (expense)
Tax-equivalized pre-tax income	[1]	9,057	9,698
Goodwill		14,262	14,262	$ 14,262
Other intangible assets, net		3,208	4,066
Total assets		2,216,573	1,731,982	$ 2,203,235
Funding Sources		$ 1,687,029	$ 1,288,964
Tax-equivalent basis tax rate		21.00%	21.00%
Tax-equivalent adjustment		$ 462	$ 484
Information Services [Member]
Fee revenue and other income:
Fee income		24,977	25,440
Interest income	[1]	5,509	4,707
Interest expense
Intersegment income (expense)
Tax-equivalized pre-tax income	[1]	6,013	5,123
Goodwill		12,433	12,433
Other intangible assets, net		634	1,040
Total assets		1,023,196	833,774
Funding Sources		837,852	677,829
Banking Services [Member]
Fee revenue and other income:
Fee income		638	615
Interest income	[1]	5,751	7,284
Interest expense		331	965
Intersegment income (expense)		623	525
Tax-equivalized pre-tax income	[1]	2,762	2,703
Goodwill		1,829	1,829
Other intangible assets, net		2,574	3,026
Total assets		1,263,669	926,445
Funding Sources		849,177	611,135
Corporate, Eliminations and Other [Member]
Fee revenue and other income:
Fee income		560	1,040
Interest income	[1]	(122)	831
Interest expense
Intersegment income (expense)		(623)	(525)
Tax-equivalized pre-tax income	[1]	282	1,872
Goodwill
Other intangible assets, net
Total assets		(70,292)	(28,237)
Funding Sources

[1] Presented on a tax-equivalent basis assuming a tax rate of 21%. The tax-equivalent adjustment was approximately $462,000 and $484,000 for the three months ended March 31, 2021 and 2020, respectively.