Net gain (loss) resulting from the sales of securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(h))
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Amount of interest income, amortization of premium and accretion of discount, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading); classified as operating.

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Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of cash inflow from the sale or maturity of long-term held-to-maturity securities.

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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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Securities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Realized loss on sale of securities	$ 1,000
Proceeds from sale of securities reclassified		$ 0	$ (217,708)
Proceeds from payments received on held-to-maturity securities	(146,500)		(146,500)
Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Interest income from securities	4,700		10,800
CMBS (Held-to-maturity Securities) [Member]
Debt Securities, Available-for-sale [Line Items]
Interest income from securities	1,300		4,200
(CBMS) Fair Value Option [Member]
Debt Securities, Available-for-sale [Line Items]
Interest income from securities	$ 3,400		$ 6,600
Restatement Adjustment [Member]
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of securities reclassified		69,200
Proceeds from payments received on held-to-maturity securities		146,500
Payments received on securities reclassified		$ 1,900