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Loans Receivable, Net - Analysis of Allowance for Loan Losses (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]    
Balance at beginning of period $ 16,577 $ 15,721
Provision charged to operations 620 1,371
Charge-offs (868) (533)
Recoveries 376 258
Balance at end of period $ 16,705 $ 16,817