Securities (Fair value and gross unrealized losses) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Available-for-sale Securities
Less than 12 months, fair value	$ 63,283	$ 74,130
Less than 12 months, unrealized (losses)	(1,033)	(2,075)
12 months or more, fair value	6,004	16,989
12 months or more, unrealized (losses)	(254)	(1,700)
Total, fair value	69,287	91,119
Total, unrealized (losses)	(1,287)	(3,775)
Held-to-maturity Securities
Less than 12 months, fair value	24,806	15,828
Less than 12 months, unrealized (losses)	(179)	(485)
12 months or more, fair value	0	0
12 months or more, unrealized (losses)	0	0
Total, fair value	24,806	15,828
Total, unrealized (losses)	(179)	(485)
U.S. Government agency securities [Member]
Held-to-maturity Securities
Less than 12 months, fair value	9,956
Less than 12 months, unrealized (losses)	(29)
12 months or more, fair value	0
12 months or more, unrealized (losses)	0
Total, fair value	9,956
Total, unrealized (losses)	(29)
Agency CMOs [Member]
Held-to-maturity Securities
Less than 12 months, fair value		1,312
Less than 12 months, unrealized (losses)		(1)
12 months or more, fair value		0
12 months or more, unrealized (losses)		0
Total, fair value		1,312
Total, unrealized (losses)		(1)
Corporate debt securities [Member]
Held-to-maturity Securities
Less than 12 months, fair value	14,850	14,516
Less than 12 months, unrealized (losses)	(150)	(484)
12 months or more, fair value	0	0
12 months or more, unrealized (losses)	0	0
Total, fair value	14,850	14,516
Total, unrealized (losses)	(150)	(484)
Agency CMOs [Member]
Available-for-sale Securities
Less than 12 months, fair value	30,776	49,793
Less than 12 months, unrealized (losses)	(230)	(175)
12 months or more, fair value	0	0
12 months or more, unrealized (losses)	0	0
Total, fair value	30,776	49,793
Total, unrealized (losses)	(230)	(175)
Private-label CMOs [Member]
Available-for-sale Securities
Less than 12 months, fair value	0	6,017
Less than 12 months, unrealized (losses)	0	(268)
12 months or more, fair value	6,004	16,989
12 months or more, unrealized (losses)	(254)	(1,700)
Total, fair value	6,004	23,006
Total, unrealized (losses)	(254)	(1,968)
Corporate debt securities [Member]
Available-for-sale Securities
Less than 12 months, fair value	19,266	18,320
Less than 12 months, unrealized (losses)	(690)	(1,632)
12 months or more, fair value	0	0
12 months or more, unrealized (losses)	0	0
Total, fair value	19,266	18,320
Total, unrealized (losses)	(690)	(1,632)
Municipal securities [Member]
Available-for-sale Securities
Less than 12 months, fair value	13,241
Less than 12 months, unrealized (losses)	(113)
12 months or more, fair value	0
12 months or more, unrealized (losses)	0
Total, fair value	13,241
Total, unrealized (losses)	$ (113)