Securities (Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ 42,724
Available for sale debt securities maturities 1-5 years amortized cost	143,155
Available for sale debt securities maturities 5-10 years amortized cost	157,073
Available for sale debt securities maturities after 10 years amortized cost	66,154
Available for sale debt securities maturities total amortized cost	409,106
Available for sale debt securities maturities within 1 year fair value	44,084
Available for sale debt securities maturities 1-5 years fair value	147,073
Available for sale debt securities maturities 5-10 years fair value	159,571
Available for sale debt securities maturities after 10 years fair value	60,624
Available for sale debt securities fair value	411,352
Held to maturity debt securities maturities within 1 year amortized cost	2,473
Held to maturity debt securities maturities 1-5 years amortized cost	7,650
Held to maturity debt securities maturities 5-10 years amortized cost	5,978
Held to maturity debt securities maturities after 10 years amortized cost	2,939
Held to maturity securities	19,040	$ 20,023
Held to maturity debt securities maturities within 1 year fair value	2,554
Held to maturity debt securities maturities 1-5 years fair value	7,901
Held to maturity debt securities maturities 5-10 years fair value	6,174
Held to maturity debt securities maturities after 10 years fair value	3,035
Held to maturity securities fair value	$ 19,664	$ 20,516