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Segment Information - Financial Information by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |
Interest income | $ 62,328 | $ 63,746
Interest expense | (23,950) | (23,961)
Net Interest Income | 38,378 | 39,785
Provision for loan losses | (289) | (206)
Mortgage banking activities, net | 7,218 | 1,923
MSR income (loss), net | 6,281 | (10,924)
Investment fair value changes, net | (19,538) | (1,145)
Other income | 955 | 809
Realized gains, net | 9,538 | 4,306
Total non-interest income (loss), net | 4,454 | (5,031)
Direct operating expenses | (30,452) | (25,063)
Provision for income taxes | (28) | 5,316
Net Income | 12,063 | 14,801
Non-cash amortization income (expense) | 7,019 | 8,762
Operating Segments | Residential Mortgage Banking |  |
Segment Reporting Information [Line Items] |  |
Interest income | 7,869 | 15,795
Interest expense | (3,289) | (3,778)
Net Interest Income | 4,580 | 12,017
Provision for loan losses | 0 | 0
Mortgage banking activities, net | 9,280 | 2,215
MSR income (loss), net | 0 | 0
Investment fair value changes, net | 0 | 2
Other income | 0 | 0
Realized gains, net | 0 | 0
Total non-interest income (loss), net | 9,280 | 2,217
Direct operating expenses | (5,321) | (10,903)
Provision for income taxes | 0 | 8
Net Income | 8,539 | 3,339
Non-cash amortization income (expense) | (43) | (46)
Operating Segments | Residential Investments |  |
Segment Reporting Information [Line Items] |  |
Interest income | 39,936 | 30,012
Interest expense | (4,953) | (2,810)
Net Interest Income | 34,983 | 27,202
Provision for loan losses | 0 | 0
Mortgage banking activities, net | 0 | 0
MSR income (loss), net | 6,281 | (10,924)
Investment fair value changes, net | (17,765) | (19)
Other income | 955 | 809
Realized gains, net | 9,246 | 4,306
Total non-interest income (loss), net | (1,283) | (5,828)
Direct operating expenses | (1,861) | (1,118)
Provision for income taxes | (28) | 3,510
Net Income | 31,811 | 23,766
Non-cash amortization income (expense) | 8,068 | 9,838
Operating Segments | Commercial Mortgage Banking and Investments |  |
Segment Reporting Information [Line Items] |  |
Interest income | 9,581 | 10,914
Interest expense | (2,952) | (3,489)
Net Interest Income | 6,629 | 7,425
Provision for loan losses | (289) | (206)
Mortgage banking activities, net | (2,062) | (292)
MSR income (loss), net | 0 | 0
Investment fair value changes, net | (137) | 0
Other income | 0 | 0
Realized gains, net | 0 | 0
Total non-interest income (loss), net | (2,199) | (292)
Direct operating expenses | (1,602) | (3,482)
Provision for income taxes | 0 | 853
Net Income | 2,539 | 4,298
Non-cash amortization income (expense) | (16) | (49)
Corporate/Other |  |
Segment Reporting Information [Line Items] |  |
Interest income | 4,942 | 7,025
Interest expense | (12,756) | (13,884)
Net Interest Income | (7,814) | (6,859)
Provision for loan losses | 0 | 0
Mortgage banking activities, net | 0 | 0
MSR income (loss), net | 0 | 0
Investment fair value changes, net | (1,636) | (1,128)
Other income | 0 | 0
Realized gains, net | 292 | 0
Total non-interest income (loss), net | (1,344) | (1,128)
Direct operating expenses | (21,668) | (9,560)
Provision for income taxes | 0 | 945
Net Income | (30,826) | (16,602)
Non-cash amortization income (expense) | $ (990) | $ (981)

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