Securities (Schedule of Book Values and Fair Values of Investment Securities by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Securities Available for Sale - Amortized Cost
Due within one year
Due after one year but within five years	44,291
Due after five years but within ten years
Due after ten years	1,000
Mortgage-backed securities	127,382
Total debt securities	172,673
Equity securities	5,960
Total securities	178,633	164,724
Securities Available for Sale - Fair Value
Due within one year
Due after one year but within five years	44,365
Due after five years but within ten years
Due after ten years	900
Mortgage-backed securities	126,930
Total debt securities	172,195
Equity securities	5,995
Total securities	178,190	164,034	180,190
Securities Held to Maturity - Amortized Cost
Due within one year	774
Due after one year but within five years	10,966
Due after five years but within ten years	37,920
Due after ten years	2,745
Mortgage-backed securities	118,399
Total debt securities	170,804	178,687	53,937
Total securities	170,804
Securities Held to Maturity - Fair Value
Due within one year	793
Due after one year but within five years	11,683
Due after five years but within ten years	40,964
Due after ten years	2,931
Mortgage-backed securities	118,385
Total debt securities	174,756
Securities held to maturity	$ 174,756	$ 182,411	$ 57,192