Goodwill and Other Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Gross carrying amount $ 32,336 $ 31,741
Accumulated amortization 17,687 15,443
Net carrying amount 14,649 16,298
Core Deposit Intangible [Member]    
Gross carrying amount 18,774 18,774
Accumulated amortization 10,538 9,131
Net carrying amount 8,236 9,643
Customer Related Intangibles [Member]    
Gross carrying amount 8,252 8,010
Accumulated amortization 3,423 2,740
Net carrying amount 4,829 5,270
Other Intangibles [Member]    
Gross carrying amount 5,310 4,957
Accumulated amortization 3,726 3,572
Net carrying amount $ 1,584 $ 1,385