Other Comprehensive Income (Loss) Component of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ (59,057)	$ (41,578)	$ (66,386)	$ (38,326)	$ (66,386)	$ (38,326)
Other comprehensive earnings before reclassifications	1,459	(2,095)	5,329	(4,079)
Amounts reclassified to net earnings, net of tax	1,787	413	2,000	827
Total other comprehensive income (loss), net of tax	3,246	(1,682)	7,329	(3,252)	10,575	(4,934)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(55,811)	(43,260)	(59,057)	(41,578)	(55,811)	(43,260)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(13,511)	(5,719)	(14,154)	(1,640)	(14,154)	(1,640)
Other comprehensive earnings before reclassifications	(1,075)	(2,095)	643	(4,079)
Amounts reclassified to net earnings, net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	(1,075)	(2,095)	643	(4,079)	(432)	(6,174)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(14,586)	(7,814)	(13,511)	(5,719)	(14,586)	(7,814)
Pensions, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(45,546)	(35,859)	(52,232)	(36,686)	(52,232)	(36,686)
Other comprehensive earnings before reclassifications	2,534	0	4,686	0
Amounts reclassified to net earnings, net of tax	1,787	413	2,000	827
Total other comprehensive income (loss), net of tax	4,321	413	6,686	827	11,007	1,240
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ (41,225)	$ (35,446)	$ (45,546)	$ (35,859)	$ (41,225)	$ (35,446)