CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
STATEMENTS OF COMPREHENSIVE INCOME
Amortization and reversal of net unrealized loss on securities transferred from available-for-sale to held-to-maturity, taxes	$ (54)	$ (29)	$ (122)
Reduction in non-credit component of otti charge, taxes	4	(16)	(16)
Reclassification adjustment for securities sold during the period, taxes	624	450	50
Net unrealized securities gains arising during the period, tax	78	29	(162)
Defined benefit plan adjustments, tax	$ (451)	$ 2,685	$ (3,765)