Securities (Unrealized Gross Losses and Estimated Fair values of Investment Securities by Length of Time that Individual Securities in Each Category in Continuous Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 115,880	$ 47,989
Unrealized Losses	(199)	(336)
Fair Value	8,174	14,787
Unrealized Losses	(697)	(2,770)
Fair Value	124,054	62,776
Unrealized Losses	(896)	(3,106)
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	42,782
Unrealized Losses	(79)
Fair Value
Unrealized Losses
Fair Value	42,782
Unrealized Losses	(79)
Collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Fair Value	73,098	37,994
Unrealized Losses	(120)	(331)
Fair Value
Unrealized Losses
Fair Value	73,098	37,994
Unrealized Losses	(120)	(331)
Private issue collateralized mortgage obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value
Unrealized Losses
Fair Value	8,174	10,641
Unrealized Losses	(697)	(1,916)
Fair Value	8,174	10,641
Unrealized Losses	(697)	(1,916)
Obligations of U.S. government sponsored enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value		9,995
Unrealized Losses		(5)
Fair Value
Unrealized Losses
Fair Value		9,995
Unrealized Losses		(5)
Equity securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value
Unrealized Losses
Fair Value		4,146
Unrealized Losses		(854)
Fair Value		4,146
Unrealized Losses		$ (854)