Other Comprehensive Income (Loss) Component of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	$ (62,854)	$ (66,386)	$ (37,704)	$ (38,326)	$ (66,386)	$ (38,326)
Other comprehensive earnings before reclassifications	2,797	2,532	(4,287)	208
Amounts reclassified to net earnings, net of tax	1,000	1,000	413	414
Total other comprehensive income (loss), net of tax	3,797	3,532	(3,874)	622	7,329	(3,252)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(59,057)	(62,854)	(41,578)	(37,704)	(59,057)	(41,578)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(11,847)	(14,154)	(1,432)	(1,640)	(14,154)	(1,640)
Other comprehensive earnings before reclassifications	(1,664)	2,307	(4,287)	208
Amounts reclassified to net earnings, net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	(1,664)	2,307	(4,287)	208	643	(4,079)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	(13,511)	(11,847)	(5,719)	(1,432)	(13,511)	(5,719)
Pensions, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(51,007)	(52,232)	(36,272)	(36,686)	(52,232)	(36,686)
Other comprehensive earnings before reclassifications	4,461	225	0	0
Amounts reclassified to net earnings, net of tax	1,000	1,000	413	414
Total other comprehensive income (loss), net of tax	5,461	1,225	413	414	6,686	827
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ (45,546)	$ (51,007)	$ (35,859)	$ (36,272)	$ (45,546)	$ (35,859)