Business Developments Changes and Developments - Goodwill Associated with Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Balance at beginning of period	$ 129,126	$ 130,758
Sale of ECB Trust Business		(475)
Foreign Currency Translation and Other	(880)	(1,157)
Balance at end of period	128,246	129,126
Goodwill, Impaired, Accumulated Impairment Loss	38,528	38,528	$ 38,528
Goodwill, Gross	166,774	167,654	$ 169,286
Investment Banking [Member]
Goodwill [Roll Forward]
Balance at beginning of period	121,599	122,756
Sale of ECB Trust Business		0
Foreign Currency Translation and Other	(880)	(1,157)
Balance at end of period	120,719	121,599
Investment Management [Member]
Goodwill [Roll Forward]
Balance at beginning of period	7,527	8,002
Sale of ECB Trust Business		(475)
Foreign Currency Translation and Other	0	0
Balance at end of period	$ 7,527	$ 7,527