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Additional Information about Impaired Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | $ 36,134 | $ 51,954
Impaired loans with no related allowance, Unpaid Principal Balance | 44,801 | 61,617
Impaired loans with no related allowance, Average Recorded Investment | 44,044 | 67,805
Impaired loans with no related allowance, Interest Income Recognized | 335 | 2,044
Multi-Family |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 13,002 | 27,464
Impaired loans with no related allowance, Unpaid Principal Balance | 15,054 | 29,379
Impaired loans with no related allowance, Average Recorded Investment | 20,233 | 30,965
Impaired loans with no related allowance, Interest Income Recognized | 208 | 1,320
Commercial Real Estate |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 11,203 | 13,995
Impaired loans with no related allowance, Unpaid Principal Balance | 16,899 | 15,480
Impaired loans with no related allowance, Average Recorded Investment | 12,599 | 25,066
Impaired loans with no related allowance, Interest Income Recognized | 54 | 383
One-to-four family |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 2,859 | 3,384
Impaired loans with no related allowance, Unpaid Principal Balance | 3,373 | 8,929
Impaired loans with no related allowance, Average Recorded Investment | 3,122 | 2,302
Impaired loans with no related allowance, Interest Income Recognized | 23 | 75
Acquisition, Development and Construction |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment |  | 2,637
Impaired loans with no related allowance, Unpaid Principal Balance |  | 3,035
Impaired loans with no related allowance, Average Recorded Investment | 1,318 | 1,086
Impaired loans with no related allowance, Interest Income Recognized |  | 148
Other loans |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with no related allowance, Recorded Investment | 9,070 | 4,474
Impaired loans with no related allowance, Unpaid Principal Balance | 9,475 | 4,794
Impaired loans with no related allowance, Average Recorded Investment | 6,772 | 8,386
Impaired loans with no related allowance, Interest Income Recognized | $ 50 | $ 118

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- Definition Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524 + Details
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