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Stockholders' Equity and Regulatory Capital Reconciliation of stockholders' equity to federal regulatory capital (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Stockholders’ equity of the Corporation	$ 206,162	$ 194,156	$ 180,707
Net unrealized and accumulated losses on specific items	933	1,348
Disallowed servicing assets	(587)	(629)
Disallowed goodwill and other intangibles	(10,466)	(10,466)
Junior subordinated notes	10,062	10,047
Tier 1 capital	206,104	194,456
Allowable general valuation allowances and subordinated debt	52,503	44,573
Total capital	$ 258,607	$ 239,029

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Servicing assets and purchased credit card relationships not allowed to be included in Tier 1 Capital per the regulatory guidelines.

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Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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