Allowance for Loan and Lease Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Orginated Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	$ 1,663,674	$ 1,639,615
Orginated Loans and Leases [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	1,586,032	1,562,228
Orginated Loans and Leases [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	44,725	42,365
Orginated Loans and Leases [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	32,917	35,022
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	577,784	562,439
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	546,980	531,293
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	21,328	20,688
Orginated Loans and Leases [Member] | Commercial and Industrial Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	9,476	10,458
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	53,261	74,788
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	51,566	72,997
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	100	100
Orginated Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	1,595	1,691
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	922,024	903,320
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	887,183	869,488
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	19,303	17,536
Orginated Loans and Leases [Member] | Commercial Real Estate Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	15,538	16,296
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	57,225	52,627
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	56,655	52,054
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	122	123
Orginated Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	448	450
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	53,380	46,441
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	43,648	36,396
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	3,872	3,918
Orginated Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	5,860	6,127
Acquired Loans and Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	524,683	537,429
Acquired Loans and Leases [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	475,610	486,546
Acquired Loans and Leases [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	14,936	17,322
Acquired Loans and Leases [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	34,137	33,561
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	129,878	128,503
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	113,741	116,160
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	7,862	3,821
Acquired Loans and Leases [Member] | Commercial and Industrial Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	8,275	8,522
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial and Industrial - Agriculture [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	351,095	39,353
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	320,106	5,809
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	5,127	11,516
Acquired Loans and Leases [Member] | Commercial Real Estate Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	25,862	22,028
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	3,055	3,135
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	1,108	1,150
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	1,947	1,985
Acquired Loans and Leases [Member] | Commercial Real Estate - Agriculture [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	40,655	366,438
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	40,655	363,427
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	0	0
Acquired Loans and Leases [Member] | Commercial Real Estate - Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases, gross	$ 0	$ 3,011