Fair Value Measurement (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Loans and leases, at fair value	$ 359,300		$ 359,300
Unrealized (losses) gains arising during the period	(5,996)	$ (37,450)	(32,558)	$ 41,412
Changes in unrealized gains and losses on junior subordinated debentures carried at fair value, net of taxes	(4,454)	(27,818)	(24,184)	30,761
Goodwill Impairment Adjustment				1,800,000
Residential Mortgage Banking Revenue
Fair Value, Option, Quantitative Disclosures [Line Items]
Net increase (decrease) in fair value	10,600	$ 6,200	(9,000)	$ 14,300
Other Income
Fair Value, Option, Quantitative Disclosures [Line Items]
Net increase (decrease) in fair value	$ 2,800		$ 2,800