Fair Value (Details 2) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Financial Assets:
Securities - held to maturity		$ 141,654	$ 142,832
Financial Liabilities:
Time deposits		826,933	870,788
Fed funds purchased and securities sold under agreements to repurchase		50,360	69,062
Other borrowings		952,035	884,815
Trust preferred debentures		16,605	37,681
Level 1
Financial Assets:
Cash and cash equivalents		78,175	63,954
Securities - held to maturity		0	0
FHLB and other stock		0	0
Accrued interest receivable		0	0
Loans/leases, net	[1]	0	0
Financial Liabilities:
Time deposits		0	0
Other deposits		0	0
Fed funds purchased and securities sold under agreements to repurchase		0	0
Other borrowings		0	0
Trust preferred debentures		0	0
Accrued interest payable		0	0
Level 2
Financial Assets:
Cash and cash equivalents		0	0
Securities - held to maturity		141,654	142,832
FHLB and other stock		45,714	43,133
Accrued interest receivable		18,376	17,390
Loans/leases, net	[1]	3,037	7,296
Financial Liabilities:
Time deposits		825,283	867,921
Other deposits		3,923,789	3,754,351
Fed funds purchased and securities sold under agreements to repurchase		50,360	69,109
Other borrowings		951,600	884,842
Trust preferred debentures		22,111	43,321
Accrued interest payable		1,867	1,902
Level 3
Financial Assets:
Cash and cash equivalents		0	0
Securities - held to maturity		0	0
FHLB and other stock		0	0
Accrued interest receivable		0	0
Loans/leases, net	[1]	4,327,169	4,180,119
Financial Liabilities:
Time deposits		0	0
Other deposits		0	0
Fed funds purchased and securities sold under agreements to repurchase		0	0
Other borrowings		0	0
Trust preferred debentures		0	0
Accrued interest payable		0	0
Carrying Amount
Financial Assets:
Cash and cash equivalents		78,175	63,954
Securities - held to maturity		139,994	142,119
FHLB and other stock		45,714	43,133
Accrued interest receivable		18,376	17,390
Loans/leases, net	[1]	4,381,439	4,222,278
Financial Liabilities:
Time deposits		826,933	870,788
Other deposits		3,923,789	3,754,351
Fed funds purchased and securities sold under agreements to repurchase		50,360	69,062
Other borrowings		952,036	884,815
Trust preferred debentures		16,605	37,681
Accrued interest payable		1,867	1,902
Fair Value
Financial Assets:
Cash and cash equivalents		78,175	63,954
Securities - held to maturity		141,654	142,832
FHLB and other stock		45,714	43,133
Accrued interest receivable		18,376	17,390
Loans/leases, net	[1]	4,330,206	4,187,415
Financial Liabilities:
Time deposits		825,283	867,921
Other deposits		3,923,789	3,754,351
Fed funds purchased and securities sold under agreements to repurchase		50,360	69,109
Other borrowings		951,600	884,842
Trust preferred debentures		22,111	43,321
Accrued interest payable		$ 1,867	$ 1,902

[1] Lease receivables, although excluded from the scope of ASC Topic 825, are included in the estimated fair value amounts at their carrying value.