Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Fair value of financial assets
Securities - held to maturity	$ 24,062		$ 25,163
FHLB and FRB stock	26,039		19,388
Financial Liabilities:
Time deposits	937,775		973,883
Securities sold under agreements to repurchase	171,498		213,973
Other borrowings	299,098		111,848
Trust preferred debentures	43,703		43,668
Carrying Amount
Fair value of financial assets
Cash and cash equivalaents	66,543		118,930
Securities - held to maturity	20,173		24,062
FHLB and FRB stock	26,039		19,388
Accrued interest receivable	17,031		17,516
Loans/leases, net	3,029,725	[1]	2,929,967	[1]
Financial Liabilities:
Time deposits	937,775		973,883
Other deposits	2,975,135		2,976,286
Securities sold under agreements to repurchase	171,498		213,973
Other borrowings	287,674		100,001
Trust preferred debentures	2,915		3,067
Accrued interest payable	43,703		43,668
Fair Value
Fair value of financial assets
Cash and cash equivalaents	66,543		118,930
Securities - held to maturity	21,129		25,163
FHLB and FRB stock	26,039		19,388
Accrued interest receivable	17,031		17,516
Loans/leases, net	3,035,038	[1]	3,047,833	[1]
Financial Liabilities:
Time deposits	943,732		984,435
Other deposits	2,975,135		2,976,286
Securities sold under agreements to repurchase	178,320		222,873
Other borrowings	294,897		111,203
Trust preferred debentures	2,915		3,067
Accrued interest payable	47,879		49,421
Level 1
Fair value of financial assets
Cash and cash equivalaents	66,543		118,930
Securities - held to maturity	0		0
FHLB and FRB 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
Securities sold under agreements to repurchase	0		0
Other borrowings	0		0
Trust preferred debentures	0		0
Accrued interest payable	0		0
Level 2
Fair value of financial assets
Cash and cash equivalaents	0		0
Securities - held to maturity	21,129		25,163
FHLB and FRB stock	26,039		19,388
Accrued interest receivable	17,031		17,516
Loans/leases, net	4,994	[1]	9,134	[1]
Financial Liabilities:
Time deposits	943,732		984,435
Other deposits	2,975,135		2,976,286
Securities sold under agreements to repurchase	178,320		222,873
Other borrowings	294,897		111,203
Trust preferred debentures	2,915		3,067
Accrued interest payable	47,879		49,421
Level 3
Fair value of financial assets
Cash and cash equivalaents	0		0
Securities - held to maturity	0		0
FHLB and FRB stock	0		0
Accrued interest receivable	0		0
Loans/leases, net	3,030,044	[1]	3,038,699	[1]
Financial Liabilities:
Time deposits	0		0
Other deposits	0		0
Securities sold under agreements to repurchase	0		0
Other borrowings	0		0
Trust preferred debentures	0		0
Accrued interest payable	$ 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.