Securities Held to Maturity (Held-to-maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost - Due after five years through ten years		$ 1,357
Held-to-maturity Securities, Total		114,216
Gross Unrealized Gains - Due after five year through ten years		32
Fair Value - Due after one year through five years		1,389
Held-to-maturity Securities, Fair Value, Total	0	115,158
Residential mortgage-backed securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost - Due within one year		998
Amortized Cost - Due after one year through five years		3,163
Amortized Cost - Due after five years through ten years		108,698
Amortized Cost - Due after ten years		112,859
Gross Unrealized Gains - Due after five year through ten years		2,239
Gross Unrealized Gains - Due after ten years		2,239
Gross Unrealized Loss - Due within one year		(2)
Gross Unrealized Loss - Due after one year through five years		(135)
Gross Unrealized Loss - Due after five year through ten years		(1,192)
Gross Unrealized Loss - Due after ten years		(1,329)
Gross Unrealized Loss - Total Due		0
Fair Value - Due within one year		996
Fair Value - Due after one year through five years		3,028
Fair Value - Due after five years through ten years		109,745
Fair Value - Due after ten years		113,769
Municipal obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost - Due after five years through ten years		1,357
Held-to-maturity Securities, Total		114,216
Gross Unrealized Gains - Due within one year		32
Gross Unrealized Gains - Total Due		2,271
Gross Unrealized Loss - Due after five year through ten years		0
Gross Unrealized Loss - Total Due		(1,329)
Fair Value - Due after five years through ten years		1,389
Held-to-maturity Securities, Fair Value, Total		$ 115,158