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Loans and Allowance for Loan Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,375,085
Unfunded Commitments	871,369
Total exposure	4,246,454	$ 3,932,059
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	1,003,666
Unfunded Commitments	398,766
Total exposure	1,402,432	1,484,697
Hotels (except for Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	847,103
Unfunded Commitments	154,986
Total exposure	1,002,089	920,001
236117 New Housing Operative Builders [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	508,964
Unfunded Commitments	575,435
Total exposure	$ 1,084,399	$ 1,100,989

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- Definition

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- Definition

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- Definition

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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