UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
STATEMENTS OF COMPREHENSIVE INCOME
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, taxes	$ 23	$ 43	$ 50	$ 64
Reduction in non-credit component of OTTI charge, taxes	4	122	8	127
Non-credit component of OTTI charge recognized during the period, tax	0	0	0	(3)
Reclassification adjustment for securities sold during the period, taxes	0	(20)	(50)	(20)
Net unrealized securities gains arising during the period, tax	(145)	(245)	51	(218)
Defined benefit plan adjustments, tax	$ 0	$ 0	$ 0	$ 256