Other Noncurrent Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Mar. 31, 2014
Other noncurrent assets
Deposits	$ 3,747	[1]	$ 4,040	[1]
Deferred financing costs	7,745		14,773
Investment in affiliates	540		549
Capitalized software, net	3,624		3,864
Retirement plans	16,917		14,941
Other	10,370		12,503
Total	$ 42,943		$ 50,670

[1] Deposits principally represent amounts held by beneficiaries as cash collateral for the Company’s contingent obligations with respect to certain environmental matters, workers' compensation insurance, and operating lease commitments.