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Environmental Matters and Other Commitments and Contingencies - Additional Information (Detail) (USD $)	Mar. 31, 2013
Environmental Remediation Obligations [Abstract]
Recorded accrual amount	$ 300,000
Upper end of the range of reasonably possible costs	1,700,000
Estimate cost of future remediation	27,000
Estimated cost of future remediation if MSD is not obtained	$ 1,700,000

Total costs accrued as of the balance sheet date for environmental loss contingencies.

The estimated maximum amount of possible loss from the contingency.