Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

The following schedule summarizes the Corporation’s off-balance sheet financial instruments at December 31, 2017:



(Dollars in thousands)	Contract/Notional Amount
Financial instruments representing credit risk:
Commitments to extend credit	$	1,127,545
Performance letters of credit	27,634
Financial standby letters of credit	24,477
Other letters of credit	849

Summary of Future Minimum Rental Commitments Under Non-cancelable Operating Leases Net of Related Sublease Revenue

At December 31, 2017, the Corporation and its subsidiaries were obligated under non-cancelable leases for various premises. Portions of certain properties are subleased. A summary of the future minimum rental commitments under non-cancelable operating leases with original or remaining terms greater than one year is as follows:



(Dollars in thousands)
Year	Amount
2018	$	3,535
2019	3,407
2020	3,468
2021	3,514
2022	3,431
Thereafter	44,320
Total	$	61,675

Summary of Future Minimum Contractual Payments With Third-Party Providers

At December 31, 2017, the Corporation had contracts with third-party providers to manage the Corporation's network operations, data processing and other related services. The projected amount of the Corporation's future minimum payments due for contracts with original or remaining terms greater than one year is as follows:



(Dollars in thousands)
Year	Amount
2018	$	5,497
2019	4,867
2020	4,348
2021	3,790
2022	2,047
Thereafter	406
Total	$	20,955