Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Loss	$ (30,402)	$ (161,563)	$ (115,996)	$ (150,470)
Income (Loss) from Discontinued Operations, net of taxes	(579)	(8,935)	15,039	(12,944)
Net Loss from Continuing Operations	(29,823)	(152,628)	(131,035)	(137,526)
Other Comprehensive (Loss) Income from Continuing Operations, net of taxes			9,910
Comprehensive Loss	(28,135)	(160,752)	(106,086)	(146,022)
Discontinued Operations
Comprehensive Loss	(579)	(11,121)	26,810	(11,922)
Continuing Operations
Change in unrecognized benefit plan gains and losses arising during the period, net of taxes of $(285) and $2,367 for the three and six months ended June 30, 2017 and June 30, 2016, respectively	(442)	3,671	(442)	3,671
Adjustment for previously unrecognized benefit plan gains and losses included in net income, net of taxes of $(23) and $(20) for the three months ended June 30, 2017 and June 30, 2016, respectively, and $(51) and $(57) for the six months ended June 30, 2017 and June 30, 2016, respectively	(36)	(30)	(80)	(88)
Change in unrecognized benefit plan gains and losses, net of taxes	(478)	3,641	(522)	3,583
Change in unrealized holding gains and losses arising during the period, net of taxes of $0 and $909 for the three months ended June 30, 2017 and June 30, 2016, respectively, and $(60) and $685 for the six months ended June 30, 2017 and June 30, 2016, respectively	(1)	1,346	(95)	998
Adjustment for gain on investment sale included in net income, net of taxes of $(1,961) for the six months ended June 30, 2017	0	0	(3,042)	0
Change in marketable securities, net of taxes	(1)	1,346	(3,137)	998
Unrealized gains and losses, net of taxes of $(2,107) and $(3,454) for the three and six months ended June 30, 2017	(3,269)	0	(5,357)	0
Gains and losses reclassified to net income, net of taxes of $621 and $1,129 for the three and six months ended June 30, 2017	963	0	1,751	0
Change in unrecognized gains and losses on cash flow hedging instruments, net of taxes	(2,306)	0	(3,606)	0
Change in foreign currency translation adjustments, net of taxes of $2,609 and $(1,161) for the three months ended June 30, 2017 and June 30, 2016, respectively, and $2,710 and $(1,095) for the six months ended June 30, 2017 and June 30, 2016, respectively	5,052	(1,990)	5,404	(1,155)
Other Comprehensive (Loss) Income from Continuing Operations, net of taxes	2,267	2,997	(1,861)	3,426
Comprehensive Loss	$ (27,556)	$ (149,631)	$ (132,896)	$ (134,100)