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Warehouse Receivables & Warehouse Lines of Credit - Summary of Warehouse Lines of Credit in Place (Detail) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Carrying Value | $ 1,054,970,000 | $ 1,254,653,000
Warehouse Agreement Borrowings [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Maximum Facility Size | 2,100,000,000 | 3,400,000,000
Carrying Value | $ 1,054,970,000 | $ 1,254,653,000
Warehouse Agreement Borrowings [Member] | JP Morgan [Member] | Pricing at daily one-month LIBOR plus 1.45%, maturing February 28, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity |  | Feb. 28, 2017
Maximum Facility Size |  | $ 300,000,000
Carrying Value |  | $ 275,945,000
Line of credit over LIBOR rate | 1.45% | 1.45%
Warehouse Agreement Borrowings [Member] | JP Morgan [Member] | Pricing at daily one-month LIBOR plus 1.45%, maturing October 23, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity | Oct. 23, 2017 | Oct. 23, 2017
Maximum Facility Size | $ 800,000,000 | $ 700,000,000
Carrying Value | $ 400,178,000 |
Line of credit over LIBOR rate | 1.45% | 1.45%
Warehouse Agreement Borrowings [Member] | JP Morgan [Member] | Pricing at daily one-month LIBOR plus 2.75%, maturing October 23, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity | Oct. 23, 2017 | Oct. 23, 2017
Maximum Facility Size | $ 25,000,000 | $ 25,000,000
Carrying Value | $ 1,433,000 | $ 3,768,000
Line of credit over LIBOR rate | 2.75% | 2.75%
Warehouse Agreement Borrowings [Member] | Bank of America (BofA) [Member] | Pricing at daily one-month LIBOR plus 1.60%, maturing January 30, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity |  | Jan. 30, 2017
Maximum Facility Size |  | $ 300,000,000
Carrying Value |  | $ 300,000,000
Line of credit over LIBOR rate | 1.60% | 1.60%
Warehouse Agreement Borrowings [Member] | Bank of America (BofA) [Member] | Pricing at daily one-month LIBOR plus 1.60%, maturing May 25, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity | Jun. 05, 2018 |
Maximum Facility Size | $ 225,000,000 | $ 200,000,000
Carrying Value | $ 127,437,000 | $ 18,555,000
Line of credit over LIBOR rate | 1.40% | 1.40%
Warehouse Agreement Borrowings [Member] | Fannie Mae ASAP Program [Member] | Pricing at daily one-month LIBOR plus 1.35%, with a LIBOR floor of 0.35%, maturing January 17, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity |  | Jan. 17, 2017
Maximum Facility Size |  | $ 200,000,000
Carrying Value |  | $ 200,000,000
Line of credit over LIBOR rate | 1.35% | 1.35%
Line of credit, LIBOR floor rate | 0.35% | 0.35%
Warehouse Agreement Borrowings [Member] | Fannie Mae ASAP Program [Member] | Pricing at daily one-month LIBOR plus 1.35%, with a LIBOR floor of 0.35%, Cancelable anytime [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Maximum Facility Size | $ 450,000,000 | $ 450,000,000
Carrying Value | $ 75,293,000 | $ 111,160,000
Current Maturity | Cancelable anytime |
Line of credit over LIBOR rate | 1.35% | 1.35%
Line of credit, LIBOR floor rate | 0.35% | 0.35%
Warehouse Agreement Borrowings [Member] | TD Bank [Member] | Pricing at daily one-month LIBOR plus 1.35%, maturing February 28, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity |  | Feb. 28, 2017
Maximum Facility Size |  | $ 375,000,000
Carrying Value |  | $ 154,032,000
Line of credit over LIBOR rate | 1.35% | 1.35%
Warehouse Agreement Borrowings [Member] | TD Bank [Member] | Pricing at daily one-month LIBOR plus 1.35%, maturing June 30, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity | Jun. 30, 2018 |
Maximum Facility Size | $ 400,000,000 | $ 400,000,000
Carrying Value | $ 320,074,000 |
Line of credit over LIBOR rate | 1.25% | 1.25%
Warehouse Agreement Borrowings [Member] | Capital One [Member] | Pricing at daily one-month LIBOR plus 1.45%, maturing January 23, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity |  | Jan. 23, 2017
Maximum Facility Size |  | $ 250,000,000
Carrying Value |  | $ 191,193,000
Line of credit over LIBOR rate | 1.45% | 1.45%
Warehouse Agreement Borrowings [Member] | Capital One [Member] | Pricing at daily one-month LIBOR plus 1.45%, maturing July 27, 2017 [Member] |  |
Warehouse Receivables And Warehouse Lines Of Credit [Line Items] |  |
Current Maturity | Jul. 27, 2017 | Jul. 27, 2017
Maximum Facility Size | $ 200,000,000 | $ 200,000,000
Carrying Value | $ 130,555,000 |
Line of credit over LIBOR rate | 1.45% | 1.45%

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- Definition This element represents the minimum amount for the debt instrument's basis spread over the variable interest rate on a debt instrument. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References Reference 1: 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(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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