Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Other Comprehensive Income [Abstract]
Net unrealized gains on securities: Balance, Beginning of Period	$ 929	$ 1,237	$ 1,147	$ 423
Unrealized holding gains arising during period, pre-tax	477	207	622	1,717
Unrealized holding gains arising during period, tax	191	64	217	657
Unrealized holding gains arising during period, after-tax	286	143	405	1,060
Less: Reclassification adjustment for gains included in net income, pre-tax		316	507	471
Less: Reclassification adjustment for gains included in net income, tax		106	170	158
Less: Reclassification adjustment for gains included in net income		210	337	313
Net unrealized gains (losses) on securities arising during period, pre-tax	477	(109)	115	1,246
Net unrealized gains (losses) on securities arising during period, tax	191	(42)	47	499
Net unrealized gains (losses) on securities arising during the period, after-tax	286	(67)	68	747
Net unrealized gains on securities: Balance, End of Period	1,215	1,170	1,215	1,170
Net unrealized gains (losses) on cash flow hedges: Balance, Beginning of Period		(141)	(26)	(300)
Unrealized holding gains on cash flow hedges arising during the period, pre-tax		153	43	416
Unrealized holding gains on cash flow hedges arising during the period, tax		62	17	166
Unrealized holding gains on cash flow hedges arising during the period, after-tax		91	26	250
Net unrealized gains (losses) on cash flow hedges: Balance, End of Period		(50)		(50)
Accumulated other comprehensive income, net of tax	$ 1,215	$ 1,120	$ 1,215	$ 1,120	$ 1,121