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Loans and Allowance for Credit Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,587,877
Unfunded Commitments	1,228,232
Total exposure	4,816,109	$ 4,442,712
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	1,376,546
Unfunded Commitments	887,899
Total exposure	2,264,445	2,126,246
Hotels (except Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	979,770
Unfunded Commitments	65,699
Total exposure	1,045,469	1,039,259
New Housing For-Sale Builders
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	493,082
Unfunded Commitments	814,372
Total exposure	$ 1,307,454	$ 1,124,302

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- Definition

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