Fair Value Measurements (Details 7) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Assets:
Cash and due from banks		$ 65,171	$ 64,834
Federal funds sold and interest bearing deposits with other banks		14,550	1,356
Investment securities, available-for-sale		791,727	791,118
Mortgages held for sale		9,825	13,604
Loans and leases, net of reserve for loan and lease losses		3,906,580	3,603,506
Liabilities:
Long-term debt and mandatorily redeemable securities		57,379	56,232
Subordinated notes		58,764	58,764
Carrying or Contract Value
Assets:
Cash and due from banks		65,171	64,834
Federal funds sold and interest bearing deposits with other banks		14,550	1,356
Investment securities, available-for-sale		791,727	791,118
Other investments and trading account securities		21,973	21,006
Mortgages held for sale		9,825	13,604
Loans and leases, net of reserve for loan and lease losses		3,906,580	3,603,506
Mortgage servicing rights		4,608	4,733
Interest rate swaps		9,859	9,125
Liabilities:
Deposits		4,139,186	3,802,860
Short-term borrowings		233,229	245,822
Long-term debt and mandatorily redeemable securities		57,379	56,232
Subordinated notes		58,764	58,764
Interest rate swaps		10,044	9,302
Off-balance-sheet instruments	[1]	0	0
Fair Value
Assets:
Cash and due from banks		65,171	64,834
Federal funds sold and interest bearing deposits with other banks		14,550	1,356
Investment securities, available-for-sale		791,727	791,118
Other investments and trading account securities		21,973	21,006
Mortgages held for sale		9,825	13,604
Loans and leases, net of reserve for loan and lease losses		3,927,967	3,626,682
Mortgage servicing rights		7,246	6,979
Interest rate swaps		9,859	9,125
Liabilities:
Deposits		4,139,649	3,803,958
Short-term borrowings		233,229	245,822
Long-term debt and mandatorily redeemable securities		57,193	56,044
Subordinated notes		48,304	59,427
Interest rate swaps		10,044	9,302
Off-balance-sheet instruments	[1]	375	305
Level 1
Assets:
Cash and due from banks		65,171	64,834
Federal funds sold and interest bearing deposits with other banks		14,550	1,356
Investment securities, available-for-sale		27,458	26,984
Other investments and trading account securities		21,973	21,006
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		2,998,443	2,824,935
Short-term borrowings		134,156	123,337
Long-term debt and mandatorily redeemable securities		0	0
Subordinated notes		0	0
Interest rate swaps		0	0
Off-balance-sheet instruments	[1]	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		758,932	756,857
Other investments and trading account securities		0	0
Mortgages held for sale		9,825	13,604
Loans and leases, net of reserve for loan and lease losses		0	0
Mortgage servicing rights		0	0
Interest rate swaps		9,859	9,125
Liabilities:
Deposits		1,141,206	979,023
Short-term borrowings		99,073	122,485
Long-term debt and mandatorily redeemable securities		57,193	56,044
Subordinated notes		48,304	59,427
Interest rate swaps		10,044	9,302
Off-balance-sheet instruments	[1]	375	305
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		5,337	7,277
Other investments and trading account securities		0	0
Mortgages held for sale		0	0
Loans and leases, net of reserve for loan and lease losses		3,927,967	3,626,682
Mortgage servicing rights		7,246	6,979
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	[1]	$ 0	$ 0

[1] Represents estimated cash outflows required to currently settle the obligations at current market rates.