CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Unrealized holding gains(losses) on securities available-for-sale arising during period, tax effects	$ 2,138	$ (2,897)	$ (74)	$ (3,938)
Reclassification adjustment for gains included in net income, tax effect	0	100	0	158
Unrealized gain (loss) on cash flow hedging derivatives, tax effect	(913)	437	(282)	1,020
Reclassification of amortization of prior service cost included in net periodic cost, tax effect	$ (20)	$ (12)	$ (41)	$ (27)