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Financial Information by Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Interest income | $ 63,351 | $ 57,420 | $ 176,820 | $ 168,664
Interest expense | (23,350) | (21,725) | (63,560) | (61,444)
Net interest income (loss) | 40,001 | 35,695 | 113,260 | 107,220
Provision for loan losses | 1,596 | (1,727) | 629 | (493)
Mortgage banking activities, net | 17,872 | (8,698) | 23,950 | 85,562
MSR income (loss), net | 5,821 | 3,113 | 4,650 | 14,681
Other market valuation adjustments, net | (3,706) | 462 | (13,966) | (6,099)
Realized gains, net | 8,532 | 10,469 | 10,687 | 23,291
Operating expenses | (21,406) | (22,320) | (63,660) | (66,937)
Other income | 1,600 |  | 1,600 |
(Provision for) benefit from income taxes | (5,213) | 4,935 | (3,703) | (9,113)
Net Income | 45,097 | 21,929 | 73,447 | 148,112
Non-cash amortization income (expense) | 8,607 | 6,205 | 25,946 | 17,940
Operating Segments | Residential Mortgage Banking |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 16,911 | 15,954 | 40,015 | 40,869
Interest expense | (4,192) | (3,501) | (7,674) | (8,631)
Net interest income (loss) | 12,719 | 12,453 | 32,341 | 32,238
Mortgage banking activities, net | 11,386 | (12,236) | 11,650 | 69,278
Other market valuation adjustments, net | 43 | (11) | 54 | 67
Operating expenses | (9,982) | (7,874) | (26,577) | (18,565)
(Provision for) benefit from income taxes | (3,352) | 4,867 | (3,258) | (6,447)
Segment Contribution | 10,814 | (2,801) | 14,210 | 76,571
Non-cash amortization income (expense) | (43) | (13) | (131) | (132)
Operating Segments | Residential Investments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 27,600 | 22,887 | 83,120 | 70,420
Interest expense | (3,142) | (2,229) | (9,106) | (7,448)
Net interest income (loss) | 24,458 | 20,658 | 74,014 | 62,972
MSR income (loss), net | 5,821 | 3,113 | 4,650 | 14,681
Other market valuation adjustments, net | (3,371) | 549 | (13,117) | (5,759)
Realized gains, net | 7,836 | 10,469 | 9,815 | 23,032
Operating expenses | (802) | (229) | (2,667) | (3,768)
(Provision for) benefit from income taxes | 150 | 377 | 1,826 | (1,284)
Segment Contribution | 34,092 | 34,937 | 74,521 | 89,874
Non-cash amortization income (expense) | 10,890 | 8,702 | 32,724 | 24,348
Operating Segments | Commercial Mortgage Banking and Investments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 12,603 | 10,740 | 34,204 | 30,534
Interest expense | (4,526) | (3,560) | (12,234) | (8,928)
Net interest income (loss) | 8,077 | 7,180 | 21,970 | 21,606
Provision for loan losses | 888 | (844) | (56) | (2,419)
Mortgage banking activities, net | 6,486 | 3,538 | 12,300 | 16,284
Realized gains, net |  |  |  | 210
Operating expenses | (2,279) | (2,176) | (7,085) | (8,026)
(Provision for) benefit from income taxes | (1,764) | 29 | (2,159) | (1,689)
Segment Contribution | 11,408 | 7,727 | 24,970 | 25,966
Non-cash amortization income (expense) | (191) | (228) | (579) | (639)
Corporate/Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 6,237 | 7,839 | 19,481 | 26,841
Interest expense | (11,490) | (12,435) | (34,546) | (36,437)
Net interest income (loss) | (5,253) | (4,596) | (15,065) | (9,596)
Provision for loan losses | 708 | (883) | 685 | 1,926
Mortgage banking activities, net |  |  |  |
MSR income (loss), net |  |  |  |
Other market valuation adjustments, net | (378) | (76) | (903) | (407)
Realized gains, net | 696 |  | 872 | 49
Operating expenses | (8,343) | (12,041) | (27,330) | (36,578)
Other income | 1,600 |  | 1,600 |
(Provision for) benefit from income taxes | (247) | (338) | (112) | 307
Segment Contribution | (11,217) | (17,934) | (40,253) | (44,299)
Net Income | (11,217) | (17,934) | (40,253) | (44,299)
Non-cash amortization income (expense) | $ (2,049) | $ (2,256) | $ (6,068) | $ (5,637)

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- Definition The aggregate net change in market value for certain assets and liabilities that was included in earnings for the period. This includes changes in market values for assets and liabilities accounted for at fair value and impairments on loans held-for-sale and real estate owned. This excludes valuation adjustments recorded in Mortgage Banking Activities, Net. + References No definition available. + Details
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-5) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1, 2 , 3, 4, 5 -Article 9 + Details
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