Transfers of Financial Assets (Tables)

12 Months Ended

Dec. 31, 2016

Transfers of Financial Assets

Schedule of carrying amounts of assets pledged as collateral

(dollars in thousands)	2016		2015
Public deposits	$	2,521,761	$	2,704,686
Federal Home Loan Bank		2,097,233		2,537,665
Federal Reserve Bank		935,672		814,177
Repurchase agreements		10,066		237,699
ACH transactions		152,394		151,330
Interest rate swaps		30,399		29,436
Total	$	5,747,525	$	6,474,993

Schedule of disaggregation of gross amount of recognized liabilities for repurchase agreements by class of collateral pledged

	December 31, 2016
	Remaining Contractual Maturity of theAgreements
	Up to				Greater than
(dollars in thousands)	30 days		30-90 days		90 days		Total
Government agency collateralized mortgage obligations	$	1,200	$	—	$	4,951	$	6,151
Government-sponsored enterprises mortgage-backed securities		—		2,000		1,000		3,000
Gross amount of recognized liabilities for repurchase agreements in Note 10	$	1,200	$	2,000	$	5,951	$	9,151

	December 31, 2015
	Remaining Contractual Maturity of the Agreements
	Up to				Greater than
(dollars in thousands)	30 days		30-90 days		90 days		Total
Non-government asset-backed securities	$	92	$	92	$	—	$	184
Collateralized mortgage obligations:
Government agency		768		—		170,669		171,437
Government-sponsored enterprises		5,340		4,908		34,282		44,530
Gross amount of recognized liabilities for repurchase agreements in Note 10	$	6,200	$	5,000	$	204,951	$	216,151