Summary Financial Information (OCI Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net income	$ 6,733	$ 7,020
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	331	(130)
Change in derivatives qualifying as hedges, net of tax	116	86
Change in pension liability and post-retirement obligations, net of tax	1	(5)
Adjustments:
Unrealized holding gain (losses) arising during the period, net of tax	277	(434)
Reclassification adjustment for loss included in net income, net of tax	(16)	(235)
Net change in unrealized gain on investments	261	(669)
Total other comprehensive income (loss)	709	(718)
Comprehensive income	7,442	6,302
Parent
Net income	6,733	7,020
Other comprehensive income (loss), net of tax:
Change in derivatives qualifying as hedges, net of tax	116	(49)
Change in pension liability and post-retirement obligations, net of tax	0
Adjustments:
Unrealized holding gain (losses) arising during the period, net of tax	0
Reclassification adjustment for loss included in net income, net of tax	0
Net change in unrealized gain on investments	0
Total other comprehensive income (loss)	116	(49)
Comprehensive income	6,849	6,971
Guarantors
Net income	1,020	1,682
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(477)	1,319
Adjustments:
Total other comprehensive income (loss)	(477)	1,319
Comprehensive income	543	3,001
Non Guarantors
Net income	1,707	1,021
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	808	(1,449)
Change in derivatives qualifying as hedges, net of tax	0	135
Change in pension liability and post-retirement obligations, net of tax	1	(5)
Adjustments:
Unrealized holding gain (losses) arising during the period, net of tax	277	(434)
Reclassification adjustment for loss included in net income, net of tax	16	235
Net change in unrealized gain on investments	261	(669)
Total other comprehensive income (loss)	1,070	(1,988)
Comprehensive income	2,777	(967)
Eliminations
Net income	(2,727)	(2,703)
Adjustments:
Comprehensive income	$ (2,727)	$ (2,703)