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Fair Value Measurements - Impaired Loans Remeasured and Reported at Fair Value of Underlying Collateral (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Carrying value of impaired loans before allocations | $ 68,202 | $ 70,221 |
Specific valuation allowance allocations | (18,836) | $ (16,235) |
Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Carrying value of impaired loans before allocations | 2,161 |  | $ 14,359
Specific valuation allowance allocations | 1,179 |  | (799)
Loans receivable, fair value disclosure | 3,340 |  | 13,560
Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Carrying value of impaired loans before allocations | 33,839 |  | 52,048
Specific valuation allowance allocations | (3,623) |  | (1,149)
Loans receivable, fair value disclosure | $ 30,216 |  | $ 50,899

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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