CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Pension and other post retirement obligations:
Amortization of actuarial (gains)/losses included in net periodic pension cost, gross	$ 363	$ (77)	$ 727	$ (156)
Tax effect	(140)	31	(281)	61
Amortization of actuarial (gains)/losses included in net periodic pension cost, net	223	(46)	446	(95)
Amortization of prior service cost included in net periodic pension cost, gross	(43)	(44)	(85)	(87)
Tax effect	16	17	33	34
Amortization of prior service cost included in net periodic pension cost, net	(27)	(27)	(52)	(53)
Other comprehensive income/(loss) related to pension and other post retirement obligations, net of taxes	196	(73)	394	(148)
Unrealized gains/(losses) on available-for-sale securities:
Net unrealized holding gains/(losses) arising during period, gross	(49,589)	36,465	(18,200)	77,023
Tax effect	19,129	(13,484)	5,756	(28,487)
Net unrealized holding gains/(losses) arising during period, net	(30,460)	22,981	(12,444)	48,536
Other comprehensive income/(loss) related to unrealized gains/(losses) on available-for-sale securities, net of taxes	(30,460)	22,981	(12,444)	48,536
Other comprehensive income/(loss), net of tax	(30,264)	22,908	(12,050)	48,388
Net income	23,840	23,676	46,137	45,850
Comprehensive income/(loss)	(6,424)	$ 46,584	34,087	$ 94,238
Accumulated Other Comprehensive Income By Component:
Unrealized loss for pension and other postretirement obligations	(26,300)		(26,300)		$ (26,941)
Tax effect	9,978		9,978		10,225
Net unrealized loss for pension and other postretirement obligations	(16,322)		(16,322)		(16,716)
Unrealized gain on available-for-sale securities	56,839		56,839		75,039
Tax effect	(21,847)		(21,847)		(27,603)
Net unrealized gain on available-for-sale securities	34,992		34,992		47,436
Accumulated other comprehensive income	$ 18,670		$ 18,670		$ 30,720