CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 6,538	$ 6,106
Other comprehensive income:
Change in net unrealized holding gains (loss) on available-for-sale securities and I/O strips	845	4,839
Deferred income taxes	(355)	(2,032)
Change in net unamortized unrealized gain on securities available-for-sale that were reclassified to securities held-to-maturity	(13)	(14)
Deferred income taxes	5	6
Reclassification adjustment for losses (gains) realized in income	6	(180)
Deferred income taxes	(2)	75
Change in unrealized gains (losses) on securities and I/O strips, net of deferred income taxes	486	2,694
Change in net pension and other benefit plan liability adjustment	39	48
Deferred income taxes	(16)	(20)
Change in pension and other benefit plan liability, net of deferred income taxes	23	28
Other comprehensive income	509	2,722
Total comprehensive income	$ 7,047	$ 8,828