Securities (Securities by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	$ 47,037
Available for sale debt securities maturities 1-5 years amortized cost	155,882
Available for sale debt securities maturities 5-10 years amortized cost	72,660
Available for sale debt securities maturities after 10 years amortized cost	57,716
Available for sale debt securities maturities total amortized cost	333,295
Available for sale debt securities maturities within 1 year weighted average yield	3.61%
Available for sale debt securities maturities 1-5 years weighted average yield	3.09%
Available for sale debt securities maturities 5-10 years weighted average yield	3.05%
Available for sale debt securities maturities after 10 years weighted average yield	1.42%
Available for sale debt securities maturities total weighted average yield	2.86%
Available for sale debt securities maturities within 1 year fair value	48,955
Available for sale debt securities maturities 1-5 years fair value	161,578
Available for sale debt securities maturities 5-10 years fair value	75,897
Available for sale debt securities maturities after 10 years fair value	54,512
Available for sale debt securities fair value	340,942
Held to maturity securities	24,025	25,222
Held to maturity debt securities maturities within 1 year fair value	3,108
Held to maturity debt securities maturities 1-5 years fair value	9,637
Held to maturity debt securities maturities 5-10 years fair value	7,612
Held to maturity debt securities maturities after 10 years fair value	4,477
Held to maturity securities fair value	24,834	26,008
Obligations of U.S. government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	0
Available for sale debt securities maturities 1-5 years amortized cost	31,003
Available for sale debt securities maturities 5-10 years amortized cost	200
Available for sale debt securities maturities after 10 years amortized cost	0
Available for sale debt securities maturities total amortized cost	31,203
Available for sale debt securities maturities within 1 year weighted average yield	0.00%
Available for sale debt securities maturities 1-5 years weighted average yield	1.72%
Available for sale debt securities maturities 5-10 years weighted average yield	2.32%
Available for sale debt securities maturities after 10 years weighted average yield	0.00%
Available for sale debt securities maturities total weighted average yield	1.73%
Mortgage-backed securities issued by US Government-sponsored enterprises [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	37,723
Available for sale debt securities maturities 1-5 years amortized cost	100,409
Available for sale debt securities maturities 5-10 years amortized cost	57,461
Available for sale debt securities maturities after 10 years amortized cost	26,954
Available for sale debt securities maturities total amortized cost	222,547
Available for sale debt securities maturities within 1 year weighted average yield	3.71%
Available for sale debt securities maturities 1-5 years weighted average yield	3.30%
Available for sale debt securities maturities 5-10 years weighted average yield	2.81%
Available for sale debt securities maturities after 10 years weighted average yield	1.76%
Available for sale debt securities maturities total weighted average yield	3.06%
Held to maturity debt securities maturities within 1 year amortized cost	3,007
Held to maturity debt securities maturities 1-5 years amortized cost	9,323
Held to maturity debt securities maturities 5-10 years amortized cost	7,364
Held to maturity debt securities maturities after 10 years amortized cost	4,331
Held to maturity securities	24,025	25,222
Held to maturity debt securities maturities within 1 year weighted average yield	3.11%
Held to maturity debt securities maturities 1-5 years weighted average yield	3.03%
Held to maturity debt securities maturities 5-10 years weighted average yield	2.78%
Held to maturity debt securities maturities after 10 years weighted average yield	0.89%
Held to maturity debt securities maturities total weighted average yield	2.58%
Held to maturity securities fair value	24,834	26,008
Obligations of states and political subdivisions [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	3,601
Available for sale debt securities maturities 1-5 years amortized cost	24,267
Available for sale debt securities maturities 5-10 years amortized cost	14,796
Available for sale debt securities maturities after 10 years amortized cost	0
Available for sale debt securities maturities total amortized cost	42,664
Available for sale debt securities maturities within 1 year weighted average yield	3.78%
Available for sale debt securities maturities 1-5 years weighted average yield	3.94%
Available for sale debt securities maturities 5-10 years weighted average yield	3.99%
Available for sale debt securities maturities after 10 years weighted average yield	0.00%
Available for sale debt securities maturities total weighted average yield	3.95%
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	0
Available for sale debt securities maturities 1-5 years amortized cost	0
Available for sale debt securities maturities 5-10 years amortized cost	0
Available for sale debt securities maturities after 10 years amortized cost	30,762
Available for sale debt securities maturities total amortized cost	30,762
Available for sale debt securities maturities within 1 year weighted average yield	0.00%
Available for sale debt securities maturities 1-5 years weighted average yield	0.00%
Available for sale debt securities maturities 5-10 years weighted average yield	0.00%
Available for sale debt securities maturities after 10 years weighted average yield	1.11%
Available for sale debt securities maturities total weighted average yield	1.11%
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturty Securities [Line Items]
Available for sale debt securities maturities within 1 year amortized cost	5,713
Available for sale debt securities maturities 1-5 years amortized cost	203
Available for sale debt securities maturities 5-10 years amortized cost	203
Available for sale debt securities maturities after 10 years amortized cost	0
Available for sale debt securities maturities total amortized cost	$ 6,119
Available for sale debt securities maturities within 1 year weighted average yield	2.84%
Available for sale debt securities maturities 1-5 years weighted average yield	1.62%
Available for sale debt securities maturities 5-10 years weighted average yield	3.21%
Available for sale debt securities maturities after 10 years weighted average yield	0.00%
Available for sale debt securities maturities total weighted average yield	2.81%