Securities Sold Under Agreements to Repurchase (Tables)

12 Months Ended

Dec. 31, 2017

Transfers and Servicing [Abstract]

Schedule of Securities Sold under Agreements to Repurchase and Related Weighted-Average Interest Rates

The following table presents securities sold under agreements to repurchase and related weighted-average interest rates for each of the years ended December 31:

	At or For the Years Ended December 31,
(dollars in thousands)	2017			2016
Outstanding at year-end	$	384,810		$	367,052
Average amount outstanding		336,539			368,757
Maximum amount outstanding at any month-end		402,543			396,695
Weighted average interest rate:
During year		0.38	%		0.41	%
End of year		0.49			0.47

Schedule of Remaining Contractual Maturity of Secured Borrowings and Class of Collateral Pledged Under Repurchase Agreements

The following table presents the contractual maturity of our secured borrowings and class of collateral pledged:

	At December 31, 2017
	Remaining Contractual Maturity of the Agreements
(dollars in thousands)	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater Than 90 days		Total
Repurchase Agreements:
U.S. Treasury and agency securities	$	359,810	$	25,000	$	—	$	—	$	384,810
Total	$	359,810	$	25,000	$	—	$	—	$	384,810