Securities (Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 64,530
Available for sale debt securities maturities 1-5 years amortized cost	149,238
Available for sale debt securities maturities 5-10 years amortized cost	131,935
Available for sale debt securities maturities after 10 years amortized cost	51,613
Available for sale debt securities maturities total amortized cost	397,316
Available for sale debt securities maturities within 1 year fair value	66,714
Available for sale debt securities maturities 1-5 years fair value	153,975
Available for sale debt securities maturities 5-10 years fair value	134,032
Available for sale debt securities maturities after 10 years fair value	47,028
Available for sale debt securities fair value	401,749
Held to maturity debt securities maturities within 1 year amortized cost	5,100
Held to maturity debt securities maturities 1-5 years amortized cost	9,696
Held to maturity debt securities maturities 5-10 years amortized cost	2,774
Held to maturity debt securities maturities after 10 years amortized cost	347
Held to maturity securities	17,917	$ 20,023
Held to maturity debt securities maturities within 1 year fair value	5,293
Held to maturity debt securities maturities 1-5 years fair value	10,063
Held to maturity debt securities maturities 5-10 years fair value	2,879
Held to maturity debt securities maturities after 10 years fair value	360
Held to maturity securities fair value	$ 18,595	$ 20,516