Pension Benefits and Other Postretirement Benefit Plans (Additional Information) (Details) - Pension Benefits [Member] - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Jan. 22, 2015
Pension and Other Postretirement Benefits Disclosure [Line Items]
Settlement charge						$ 77
Former President and Chief Executive Officer [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Benefit payments				$ 800
Settlement charge				100
Qualified Defined Benefit Pension Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Employer contributions	$ 6,500		$ 6,500
Non-Qualified Defined Benefit Pension Plan [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Employer contributions		$ 0		$ 800	$ 0
Arlon [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Unfunded status of the plan							$ 2,000