CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 11,380	$ 11,312	$ 22,516	$ 21,224
Change in securities available for sale:
Unrealized holding gain (loss) on securities available for sale arising during the period	(5,230)	4,761	(1,568)	9,552
Reclassification adjustment for (gains) losses included in net income	0	(4)	(42)	(4)
Net securities gain (loss) activity during the period	(5,230)	4,757	(1,610)	9,548
Tax effect	2,046	(1,888)	603	(3,792)
Net of tax amount	(3,184)	2,869	(1,007)	5,756
Defined benefit pension plans:
Net gain (loss) on defined benefit pension plans	0	0	(276)	64
Amortization of net actuarial loss	61	50	122	99
Net gain (loss) activity during the period	61	50	(154)	163
Tax effect	(24)	(21)	53	(73)
Net of tax amount	37	29	(101)	90
Total other comprehensive income (loss), net of tax	(3,147)	2,898	(1,108)	5,846
Comprehensive income	$ 8,233	$ 14,210	$ 21,408	$ 27,070