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FAIR VALUES OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Mortgage servicing rights |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | $ 49,939 | $ 19,082
Transfers out of Level 3 | 0 | 0
Total gains or losses (realized/unrealized): |  |
Included in earnings—fair value adjustment | (8,201) | (528)
Additions | 8,582 | 10,192
Sales, settlements, and other | (1,950) | (7,581)
Balance at end of period | 48,370 | 21,165
Agency mortgage-backed securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 18,291 | 0
Transfers out of Level 3 | 0 | 0
Total gains or losses (realized/unrealized): |  |
Included in earnings—fair value adjustment | 47 | 0
Additions | 9,826 | 0
Sales, settlements, and other | (1,584) | 0
Balance at end of period | $ 26,580 | $ 0

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- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Fair Value Adjustment Including in Earnings + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales and Settlements + References No definition available. + Details
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- Definition Fair Value Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Total Gains (Losses) [Abstract] + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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