Loans, Notes and Certificates, and Loan Servicing Rights - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Loans funded by the company	$ 23,800
Secured borrowings	$ 15,113	$ 0
Debt instrument, interest rate, effective percentage rate range, minimum	4.99%	4.99%
Debt instrument, interest rate, effective percentage rate range, maximum	31.89%	29.90%
Minimum
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Notes and certificates term	12 months	12 months
Maximum
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Notes and certificates term	60 months	60 months
Loan Servicing Rights
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Payment frequency for the debt instrument	monthly	monthly
Debt instrument, interest rate, effective percentage rate range, minimum	2.99%	2.99%
Debt instrument, interest rate, effective percentage rate range, maximum	33.15%	33.15%
Debt instrument, maturity date, description	March 2023	December 2022
Principal balance of underlying loan servicing rights	$ 5,270,000	$ 4,290,000
Loan Servicing Rights \| Minimum
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Notes and certificates term	12 months	3 months
Loan Servicing Rights \| Maximum
Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]
Notes and certificates term	84 months	84 months

Loans, Notes and Certificates, and Loan Servicing Rights [Line Items]

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- Definition

Loans at fair value that were funded by the Company.

+ References

No definition available.

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- Definition

Long Term Notes Maturity Term

+ References

No definition available.

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- Definition

Principal balances of underlying loans for the loan servicing rights.

+ References

No definition available.

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

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- Definition

When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC
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- Definition

When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Publisher SEC
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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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