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Debt - Additional Information (Detail) - Jun. 30, 2015 - USD ($)	Total
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repurchase agreement maximum loan borrowing capacity	$ 25,000,000
Expiration date of repurchase agreement	Jul. 28, 2016
Debt outstanding under repurchase agreement	$ 0
Borrowing base	0
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Senior notes principal amount	$ 600,000,000
Senior notes effective interest rate	3.97%
Senior notes maturity	Sep. 15, 2022
Senior notes interest rate	3.95%
Frequency of senior notes payment	semi-annually in arrears on March 15 and September 15

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- Definition

Debt instrument borrowing base limitation amount.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

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-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



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

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Carrying value as of the balance sheet date of the outstanding short-term borrowings under a revolving line of credit used by mortgage bankers to finance the origination or purchase of loans.

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