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Fair Value Measurements - Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Earning assets |  |
Tax indemnification receivable | $ 187,156 | $ 186,076
Derivative instruments | 37,802 | 6,036
Interest-bearing liabilities |  |
Derivative instruments | 38,045 | 21,219
Fair Value |  |
Earning assets |  |
Loans held for investment, net | 13,911,665 | 12,343,726
Cash and cash equivalents | 938,480 | 2,416,219
Available-for-sale investments | 203,597 | 195,391
Accrued interest receivable | 650,813 | 564,496
Tax indemnification receivable | 187,156 | 186,076
Derivative instruments | 52,007 | 15,314
Total earning assets | 15,943,718 | 15,721,222
Interest-bearing liabilities |  |
Short-term borrowings | 526,500 | 500,175
Long-term borrowings | 555,365 | 567,468
Accrued interest payable | 25,464 | 16,385
Derivative instruments | 52,250 | 30,497
Total interest-bearing liabilities | 12,721,829 | 12,599,229
Fair Value | Money-market and savings accounts |  |
Interest-bearing liabilities |  |
Deposits | 5,805,018 | 5,556,254
Fair Value | Certificates of deposit |  |
Interest-bearing liabilities |  |
Deposits | 5,757,232 | 5,928,450
Carrying Value |  |
Earning assets |  |
Loans held for investment, net | 13,108,425 | 11,630,591
Cash and cash equivalents | 938,480 | 2,416,219
Available-for-sale investments | 203,597 | 195,391
Accrued interest receivable | 650,813 | 564,496
Tax indemnification receivable | 187,156 | 186,076
Derivative instruments | 52,007 | 15,314
Total earning assets | 15,140,478 | 15,008,087
Interest-bearing liabilities |  |
Short-term borrowings | 526,500 | 500,175
Long-term borrowings | 558,513 | 579,101
Accrued interest payable | 25,464 | 16,385
Derivative instruments | 52,250 | 30,497
Total interest-bearing liabilities | 12,705,119 | 12,613,865
Carrying Value | Money-market and savings accounts |  |
Interest-bearing liabilities |  |
Deposits | 5,805,018 | 5,556,254
Carrying Value | Certificates of deposit |  |
Interest-bearing liabilities |  |
Deposits | 5,737,374 | 5,931,453
Difference |  |
Earning assets |  |
Loans held for investment, net | 803,240 | 713,135
Cash and cash equivalents | 0 | 0
Available-for-sale investments | 0 | 0
Accrued interest receivable | 0 | 0
Tax indemnification receivable | 0 | 0
Derivative instruments | 0 | 0
Total earning assets | 803,240 | 713,135
Interest-bearing liabilities |  |
Short-term borrowings | 0 | 0
Long-term borrowings | 3,148 | 11,633
Accrued interest payable | 0 | 0
Derivative instruments | 0 | 0
Total interest-bearing liabilities | (16,710) | 14,636
Excess of net asset fair value over carrying value | 786,530 | 727,771
Difference | Money-market and savings accounts |  |
Interest-bearing liabilities |  |
Deposits | 0 | 0
Difference | Certificates of deposit |  |
Interest-bearing liabilities |  |
Deposits | $ (19,858) | $ 3,003

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Subparagraph c -Article 7 + Details
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