Fair Value Measurements (Details 7) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 64,636	$ 58,578
Federal funds sold and interest bearing deposits with other banks	34,788	49,726
Investment securities, available-for-sale	893,973	850,467
Other investments	25,953	22,458
Mortgages held for sale	11,000	15,849
Loans and leases, net of reserve for loan and lease losses	4,343,346	4,099,528
Liabilities:
Long-term debt and mandatorily redeemable securities	70,482	74,308
Subordinated notes	58,764	58,764
Carrying or Contract Value
Assets:
Cash and due from banks	64,636	58,578
Federal funds sold and interest bearing deposits with other banks	34,788	49,726
Investment securities, available-for-sale	893,973	850,467
Other investments	25,953	22,458
Mortgages held for sale	11,000	15,849
Loans and leases, net of reserve for loan and lease losses	4,343,346	4,099,528
Mortgage servicing rights	4,360	4,297
Interest rate swaps	5,680	6,621
Liabilities:
Deposits	4,573,712	4,333,760
Short-term borrowings	316,765	291,943
Long-term debt and mandatorily redeemable securities	70,482	74,308
Subordinated notes	58,764	58,764
Interest rate swaps	5,785	6,743
Off-balance-sheet instruments	0	0
Fair Value
Assets:
Cash and due from banks	64,636	58,578
Federal funds sold and interest bearing deposits with other banks	34,788	49,726
Investment securities, available-for-sale	893,973	850,467
Other investments	25,953	22,458
Mortgages held for sale	11,000	15,849
Loans and leases, net of reserve for loan and lease losses	4,343,808	4,107,079
Mortgage servicing rights	7,097	7,484
Interest rate swaps	5,680	6,621
Liabilities:
Deposits	4,571,242	4,332,744
Short-term borrowings	316,765	291,943
Long-term debt and mandatorily redeemable securities	69,221	73,149
Subordinated notes	56,048	51,031
Interest rate swaps	5,785	6,743
Off-balance-sheet instruments	300	382
Level 1
Assets:
Cash and due from banks	64,636	58,578
Federal funds sold and interest bearing deposits with other banks	34,788	49,726
Investment securities, available-for-sale	24,916	28,366
Other investments	25,953	22,458
Mortgages held for sale	0	0
Loans and leases, net of reserve for loan and lease losses	0	0
Mortgage servicing rights	0	0
Interest rate swaps	0	0
Liabilities:
Deposits	3,337,440	3,277,108
Short-term borrowings	148,771	163,652
Long-term debt and mandatorily redeemable securities	0	0
Subordinated notes	0	0
Interest rate swaps	0	0
Off-balance-sheet instruments	0	0
Level 2
Assets:
Cash and due from banks	0	0
Federal funds sold and interest bearing deposits with other banks	0	0
Investment securities, available-for-sale	865,887	818,595
Other investments	0	0
Mortgages held for sale	11,000	15,849
Loans and leases, net of reserve for loan and lease losses	0	0
Mortgage servicing rights	0	0
Interest rate swaps	5,680	6,621
Liabilities:
Deposits	1,233,802	1,055,636
Short-term borrowings	167,994	128,291
Long-term debt and mandatorily redeemable securities	69,221	73,149
Subordinated notes	56,048	51,031
Interest rate swaps	5,785	6,743
Off-balance-sheet instruments	300	382
Level 3
Assets:
Cash and due from banks	0	0
Federal funds sold and interest bearing deposits with other banks	0	0
Investment securities, available-for-sale	3,170	3,506
Other investments	0	0
Mortgages held for sale	0	0
Loans and leases, net of reserve for loan and lease losses	4,343,808	4,107,079
Mortgage servicing rights	7,097	7,484
Interest rate swaps	0	0
Liabilities:
Deposits	0	0
Short-term borrowings	0	0
Long-term debt and mandatorily redeemable securities	0	0
Subordinated notes	0	0
Interest rate swaps	0	0
Off-balance-sheet instruments	$ 0	$ 0