Loans and Leases (Carrying amount loans not covered by loss share agreements) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	$ 7,568	$ 7,716
Non Impaired Purchased Loans	1,162,600	775,581
Total Purchased Loans	1,170,168	783,297
Commercial
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	3,261	0
Non Impaired Purchased Loans	154,959	159,393
Total Purchased Loans	158,220	159,393
Commercial real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	4,071	7,716
Non Impaired Purchased Loans	762,523	494,010
Total Purchased Loans	766,594	501,726
Agricultural and agricultural real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	771	2,985
Total Purchased Loans	771	2,985
Residential real estate
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	236	0
Non Impaired Purchased Loans	187,274	85,549
Total Purchased Loans	187,510	85,549
Consumer
Loans covered by loss share agreement (carrying amount) [Line Items]
Impaired Purchased Loans	0	0
Non Impaired Purchased Loans	57,073	33,644
Total Purchased Loans	$ 57,073	$ 33,644