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Fair Value Measurements - (Details 7) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial assets
Securities held to maturity	$ 339,619	$ 356,282
Securities available for sale	737,006	674,248
Mortgage loans held for sale	232,398	177,866
Mortgage servicing rights	31,826	26,302
Carrying Value
Financial assets
Cash and cash equivalents	236,061	306,224
Securities held to maturity		356,282
Securities available for sale		674,248
Mortgage loans held for sale		177,866
Loans, net	6,326,858	6,159,972
Mortgage servicing rights	31,826	26,302
Derivative instruments	6,786	9,108
Financial liabilities
Deposits	7,202,025	7,059,137
Short-term borrowings	120,121	109,676
Other long-term borrowings	122	147
Federal Home Loan Bank advances	8,024	8,542
Junior subordinated debentures	85,607	95,643
Subordinated notes	98,203	98,127
Derivative instruments	5,881	5,910
Fair Value
Financial assets
Cash and cash equivalents	236,061	306,224
Securities held to maturity	353,064	362,893
Securities available for sale	737,006	674,248
Mortgage loans held for sale	232,398	177,866
Loans, net	6,241,238	5,989,790
Mortgage servicing rights	37,563	32,064
Derivative instruments	6,786	9,108
Financial liabilities
Deposits	7,203,557	7,069,411
Short-term borrowings	120,121	109,676
Other long-term borrowings	122	147
Federal Home Loan Bank advances	8,280	8,777
Junior subordinated debentures	66,826	73,301
Subordinated notes	101,950	101,000
Derivative instruments	5,881	5,910
Fair Value | Level 1
Financial assets
Cash and cash equivalents	236,061	306,224
Securities held to maturity	0	0
Securities available for sale	0	0
Mortgage loans held for sale	0	0
Loans, net	0	0
Mortgage servicing rights	0	0
Derivative instruments	0	0
Financial liabilities
Deposits	5,588,280	5,438,384
Short-term borrowings	120,121	109,676
Other long-term borrowings	122	147
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	0	0
Subordinated notes	0	0
Derivative instruments	0	0
Fair Value | Level 2
Financial assets
Cash and cash equivalents	0	0
Securities held to maturity	353,064	362,893
Securities available for sale	720,014	655,859
Mortgage loans held for sale	232,398	177,866
Loans, net	0	0
Mortgage servicing rights	0	0
Derivative instruments	6,786	9,108
Financial liabilities
Deposits	1,615,277	1,631,027
Short-term borrowings	0	0
Other long-term borrowings	0	0
Federal Home Loan Bank advances	8,280	8,777
Junior subordinated debentures	66,826	73,301
Subordinated notes	101,950	101,000
Derivative instruments	5,881	5,910
Fair Value | Level 3
Financial assets
Cash and cash equivalents	0	0
Securities held to maturity	0	0
Securities available for sale	16,992	18,389
Mortgage loans held for sale	0	0
Loans, net	6,241,238	5,989,790
Mortgage servicing rights	37,563	32,064
Derivative instruments	0	0
Financial liabilities
Deposits	0	0
Short-term borrowings	0	0
Other long-term borrowings	0	0
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	0	0
Subordinated notes	0	0
Derivative instruments	$ 0	$ 0

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