Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012
Accumulated Other Comprehensive Income Details
Net unrealized gain on securities available-for-sale	$ 3,876	$ 3,498
Net unrealized loss for unfunded status of split-dollar life insurance plan liability (tax free)		(246)
Net unrealized loss for unfunded status of defined benefit plan liability	(1,026)	(1,096)
Accumulated other comprehensive income	2,850	2,156
Tax effect	(969)	(816)
Net-of-tax amount	$ 1,881	$ 1,340