Securities Purchased under Resale Agreements and Sold under Repurchase Agreements (Tables)

3 Months Ended

Mar. 31, 2018

Resale and Repurchase Agreements [Abstract]

Schedule of balance sheet offsetting for resale and repurchase agreements

The following tables present the resale and repurchase agreements included on the Consolidated Balance Sheet as of March 31, 2018 and December 31, 2017:

($ in thousands)	As of March 31, 2018
	Gross Amounts of Recognized Assets		Gross Amounts Offset on the Consolidated Balance Sheet			Net Amounts of Assets Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
Assets								Financial Instruments		Collateral Received				Net Amount
Resale agreements	$	1,450,000	$	(400,000	)	$	1,050,000	$	—	$	(1,037,413	)	(1)	$	12,587
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset on the Consolidated Balance Sheet			Net Amounts of Liabilities Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
Liabilities								Financial Instruments		Collateral  Pledged				Net Amount
Repurchase agreements	$	450,000	$	(400,000	)	$	50,000	$	—	$	(50,000	)	(2)	$	—

($ in thousands)	As of December 31, 2017
	Gross Amounts of Recognized Assets		Gross Amounts Offset on the Consolidated Balance Sheet			Net Amounts of Assets Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
Assets								Financial Instruments		Collateral Received				Net Amount
Resale agreements	$	1,450,000	$	(400,000	)	$	1,050,000	$	—	$	(1,045,696	)	(1)	$	4,304
	Gross Amounts of Recognized Liabilities		Gross Amounts Offset on the Consolidated Balance Sheet			Net Amounts of Liabilities Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
Liabilities								Financial Instruments		Collateral  Pledged				Net Amount
Repurchase agreements	$	450,000	$	(400,000	)	$	50,000	$	—	$	(50,000	)	(2)	$	—

(1) Represents the fair value of securities the Company has received under resale agreements, limited for table presentation purposes to the amount of the recognized asset due from each counterparty.

(2) Represents the fair value of securities the Company has pledged under repurchase agreements, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty.