Fair Value Measurements - (Details 7) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial assets
Securities held to maturity	$ 389,145	$ 458,400
Securities available for sale	674,447	646,805
Mortgage loans held for sale	276,782	225,254
Loans covered under loss-share agreements	42,171	93,142
FDIC loss-share indemnification asset	5,547	7,149
Mortgage servicing rights	17,184	29,642
Mortgage servicing rights	17,206
Other Real Estate Owned Measured at Fair Value on Non Recurring Basis	4,976	12,839
Level 1
Financial assets
Cash and cash equivalents	210,808	211,571
Securities held to maturity	0	0
Securities available for sale	0	0
Mortgage loans held for sale	0	0
Loans covered under loss-share agreements	0	0
Loans not covered under loss-share agreements, net	0	0
FDIC loss-share indemnification asset	0	0
Mortgage servicing rights	0	0
Mortgage servicing rights	0
Other Real Estate Owned Measured at Fair Value on Non Recurring Basis	0	0
Derivative instruments	0	0
Financial liabilities
Deposits	5,093,407	4,723,312
Short-term borrowings	444,989	422,279
Other long-term borrowings	170	192
Federal Home Loan Bank advances	0	0
Junior subordinated debentures	0	0
Derivative instruments	0	0
Level 2
Financial assets
Cash and cash equivalents	0	0
Securities held to maturity	409,768	473,753
Securities available for sale	656,268	627,336
Mortgage loans held for sale	276,782	225,254
Loans covered under loss-share agreements	0	0
Loans not covered under loss-share agreements, net	0	0
FDIC loss-share indemnification asset	0	0
Mortgage servicing rights	0	0
Mortgage servicing rights	0
Other Real Estate Owned Measured at Fair Value on Non Recurring Basis	0	0
Derivative instruments	10,973	7,498
Financial liabilities
Deposits	1,610,539	1,502,202
Short-term borrowings	0	0
Other long-term borrowings	0	0
Federal Home Loan Bank advances	51,024	56,101
Junior subordinated debentures	73,301	78,095
Derivative instruments	17,118	7,319
Level 3
Financial assets
Cash and cash equivalents	0	0
Securities held to maturity	0	0
Securities available for sale	18,179	19,469
Mortgage loans held for sale	0	0
Loans covered under loss-share agreements	40,637	92,528
Loans not covered under loss-share agreements, net	5,883,645	5,208,630
FDIC loss-share indemnification asset	5,547	7,149
Mortgage servicing rights		33,283
Mortgage servicing rights	17,206
Other Real Estate Owned Measured at Fair Value on Non Recurring Basis	4,976	12,839
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
Derivative instruments	0	0
Carrying Value
Financial assets
Cash and cash equivalents	210,808	211,571
Securities held to maturity	389,145	458,400
Securities available for sale	674,447	646,805
Mortgage loans held for sale	276,782	225,254
Loans covered under loss-share agreements	42,171	93,142
Loans not covered under loss-share agreements, net	5,879,160	5,277,883
FDIC loss-share indemnification asset	5,547	7,149
Mortgage servicing rights	17,184	29,642
Derivative instruments	10,973	7,498
Financial liabilities
Deposits	6,702,487	6,218,602
Short-term borrowings	444,989	422,279
Other long-term borrowings	170	192
Federal Home Loan Bank advances	48,122	52,930
Junior subordinated debentures	95,369	95,095
Derivative instruments	17,118	7,319
Fair Value
Financial assets
Cash and cash equivalents	210,808	211,571
Securities held to maturity	409,768	473,753
Securities available for sale	674,447	646,805
Mortgage loans held for sale	276,782	225,254
Loans covered under loss-share agreements	40,637	92,528
Loans not covered under loss-share agreements, net	5,883,645	5,208,630
FDIC loss-share indemnification asset	5,547	7,149
Mortgage servicing rights	17,206	33,283
Derivative instruments	10,973	7,498
Financial liabilities
Deposits	6,703,946	6,225,514
Short-term borrowings	444,989	422,279
Other long-term borrowings	170	192
Federal Home Loan Bank advances	51,024	56,101
Junior subordinated debentures	73,301	78,095
Derivative instruments	$ 17,118	$ 7,319