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Loans - Loans (Parenthetical) (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total gross loans receivable | $ 4,825,642 | $ 4,610,147
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total gross loans receivable | 12,126 | 13,670
Consumer | Home equity line of credit |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total gross loans receivable | $ 7,600 | $ 8,200

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