Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Financial Instruments with Off Balance Sheet Risk

The following table presents the contractual and notional amounts of financial instruments with off-balance sheet risk:

(Dollars in thousands)
December 31,	2017		2016
Financial instruments whose contract amounts represent credit risk:
Commitments to extend credit:
Commercial loans		$537,310		$430,710
Home equity lines	254,855		232,375
Other loans	48,819		49,708
Standby letters of credit	6,666		6,250
Financial instruments whose notional amounts exceed the amount of credit risk:
Forward loan commitments:
Interest rate lock commitments	45,139		49,502
Commitments to sell mortgage loans	71,539		78,896
Loan related derivative contracts:
Interest rate swaps with customers	545,049		428,723
Mirror swaps with counterparties	545,049		428,723
Risk participation-in agreements	34,052		28,460
Foreign exchange contracts	3,005		—
Interest rate risk management contracts:
Interest rate swaps	60,000		60,000

Schedule of Future Minimum Annual Lease Payments

The following table presents the minimum annual lease payments under the terms of these leases, exclusive of renewal provisions:

(Dollars in thousands)
Years ending December 31:	2018		$3,518
	2019	3,542
	2020	2,863
	2021	2,530
	2022	2,158
	2023 and thereafter	24,652
Total minimum lease payments			$39,263