CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 7,295	$ 4,477	$ 13,401	$ 8,615
Other comprehensive income (loss):
Change in net unrealized holding gains on available-for-sale securities and I/O strips	2,723	(3,404)	7,562	(2,516)
Deferred income taxes	(1,144)	1,430	(3,176)	1,056
Change in net unamortized unrealized gain on securities available-for-sale that were reclassified to securities held-to-maturity	(76)	(14)	(90)	(28)
Deferred income taxes	32	6	38	12
Reclassification adjustment for gains on sales of securities realized in income	(347)		(527)
Deferred income taxes	146		221
Change in unrealized gains on securities and I/O strips, net of deferred income taxes	1,334	(1,982)	4,028	(1,476)
Change in net pension and other benefit plan liabilities adjustment	38	48	86	96
Deferred income taxes	(16)	(20)	(36)	(40)
Change in pension and other benefit plan liabilities net of deferred income taxes	22	28	50	56
Other comprehensive income (loss)	1,356	(1,954)	4,078	(1,420)
Total comprehensive income	$ 8,651	$ 2,523	$ 17,479	$ 7,195