Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020		Jan. 01, 2020	Dec. 31, 2019
Preferred shares, par value	$ 1.00			$ 1.00
Common shares, par value	$ 0.01			$ 0.01
Allowance for Unfunded Commitments	$ 56,276			$ 21,907
Allowance for Loan Losses				201,371
Retained Earnings (Accumulated Deficit)	2,296,176	[1]		2,380,867
Accounting Standards Update 2016-13
Retained Earnings (Accumulated Deficit)			$ 98,000
Deferred Income Tax Assets, Net			33,000
Cumulative Effect, Period Of Adoption, Adjustment
Allowance for Loan Losses			131,147
Allowance for Loan Losses [Member]
Allowance for Loan Losses	337,793			201,371
Allowance for Loan Losses [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Loan Losses			112,000
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Allowance for Unfunded Commitments	$ 56,276			$ 21,907
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Unfunded Commitments			19,000
Allowance for Loans Losses and Unfunded Commitments [Member] | Cumulative Effect, Period Of Adoption, Adjustment | Accounting Standards Update 2016-13
Allowance for Loan Losses			$ 131,000

[1] (b) At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million, included in accrued expenses and other liabilities. Prior periods were unadjusted due to the modified retrospective application of ASU 2016-13.