CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 4,138	$ 3,076
Other comprehensive income (loss):
Change in net unrealized holding gains on available-for-sale securities and I/O strips	888	2,750
Deferred income taxes	(374)	(1,155)
Change in net unamortized unrealized gain on securities available-for-sale that were reclassified to securities held-to-maturity	(14)	(14)
Deferred income taxes	6	6
Reclassification adjustment for gains realized in income		(50)
Deferred income taxes		21
Change in unrealized gains on securities and I/O strips, net of deferred income taxes	506	1,558
Change in net pension and other benefit plan liabilities adjustment	48	(9)
Deferred income taxes	(20)	4
Change in pension and other benefit plan liabilities, net of deferred income taxes	28	(5)
Other comprehensive income	534	1,553
Total comprehensive income	$ 4,672	$ 4,629