Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Fair value of financial assets
Securities - held to maturity	$ 19,434		$ 19,625
FHLB stock	18,240		25,041
Financial Liabilities:
Time deposits	898,884		865,702
Fed funds purchased and securities sold under agreements to repurchase	158,794		167,724
Other borrowings	214,616		331,531
Trust preferred debentures	37,211		37,169
Carrying Amount [Member]
Fair value of financial assets
Cash and cash equivalaents	98,299		82,884
Securities - held to maturity	18,820		18,980
FHLB stock	18,240		25,041
Accrued interest receivable	16,655		16,586
Loans/leases, net	3,176,198	[1]	3,166,314	[1]
Financial Liabilities:
Time deposits	898,884		865,702
Other deposits	3,206,286		3,081,514
Fed funds purchased and securities sold under agreements to repurchase	158,794		167,724
Other borrowings	203,388		320,239
Accrued interest payable	1,968		2,121
Trust preferred debentures	37,211		37,169
Fair Value [Member]
Fair value of financial assets
Cash and cash equivalaents	98,299		82,884
Securities - held to maturity	19,434		19,625
FHLB stock	18,240		25,041
Accrued interest receivable	16,655		16,586
Loans/leases, net	3,202,015	[1]	3,201,837	[1]
Financial Liabilities:
Time deposits	902,770		870,857
Other deposits	3,206,286		3,081,514
Fed funds purchased and securities sold under agreements to repurchase	164,014		173,425
Other borrowings	208,694		326,193
Accrued interest payable	1,968		2,121
Trust preferred debentures	41,924		41,673
Level 1 [Member]
Fair value of financial assets
Cash and cash equivalaents	98,299		82,884
Securities - held to maturity	0		0
FHLB stock	0		0
Accrued interest receivable	0		0
Loans/leases, net	0	[1]	0	[1]
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
Accrued interest payable	0		0
Trust preferred debentures	0		0
Level 2 [Member]
Fair value of financial assets
Cash and cash equivalaents	0		0
Securities - held to maturity	19,434		19,625
FHLB stock	18,240		25,041
Accrued interest receivable	16,655		16,586
Loans/leases, net	4,163	[1]	6,846	[1]
Financial Liabilities:
Time deposits	902,770		870,857
Other deposits	3,206,286		3,081,514
Fed funds purchased and securities sold under agreements to repurchase	164,014		173,425
Other borrowings	208,694		326,193
Accrued interest payable	1,968		2,121
Trust preferred debentures	41,924		41,673
Level 3 [Member]
Fair value of financial assets
Cash and cash equivalaents	0		0
Securities - held to maturity	0		0
FHLB stock	0		0
Accrued interest receivable	0		0
Loans/leases, net	3,197,852	[1]	3,194,991	[1]
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
Accrued interest payable	0		0
Trust preferred debentures	$ 0		$ 0

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