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Activity in Allowance for Losses on Non-Covered Loans (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | $ 139,857 | $ 141,946 |
Charge-offs |  | (2,588) | (8,076) |
Recoveries |  | 10,773 | 5,987 |
Transfer from the allowance for losses on covered loans | [1] | 2,416 |  |
(Recovery of) provision for non-covered loan losses |  | (15,004) | (18,587) | $ 30,758
Balance, end of period |  | 147,124 | 139,857 | 141,946
Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | (3,334) |  | 18,000
Mortgage Receivable |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | 122,616 | 123,991 |
Charge-offs |  | (1,315) | (2,780) |
Recoveries |  | 5,765 | 1,405 |
Transfer from the allowance for losses on covered loans | [1] | 2,250 |  |
Balance, end of period |  | 124,478 | 122,616 | 123,991
Mortgage Receivable | Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | (4,838) |  |
Other loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | 17,241 | 17,955 |
Charge-offs |  | (1,273) | (5,296) |
Recoveries |  | 5,008 | 4,582 |
Transfer from the allowance for losses on covered loans | [1] | 166 |  |
Balance, end of period |  | 22,646 | $ 17,241 | $ 17,955
Other loans | Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | $ 1,504 |  |
[1] | Represents the allowance associated with $14.2 million of loans acquired in the Desert Hills transaction that were transferred from covered loans to non-covered loans upon expiration of the related FDIC loss sharing agreement in March 2015.

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- Definition Allowance For Loan Losses, Transfers From Allowance For Covered Loans + References No definition available. + Details
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- Definition Provision Recoveries For Loan Losses + References No definition available. + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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