Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noninterest Expense	$ 39,384	$ 42,026	$ 125,150	$ 123,064
Assets held-for-sale from discontinued operations	87,904		87,904		$ 113,650
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other real estate owned expenses and losses	745	2,100	2,300	3,800
Disposal Group, Including Discontinued Operation, Loan Portfolio, Book Value						$ 1,100,000
Assets held-for-sale from discontinued operations	87,904		87,904		$ 113,650
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noninterest Expense	$ 384	$ 1,400	$ 1,500	$ 2,300