Schedule of Restructuring Liability (Detail) (Severance, USD $) In Thousands, unless otherwise specified	3 Months Ended
Jun. 30, 2012
Severance
Restructuring Cost and Reserve [Line Items]
Balance at March 31, 2012	$ 360
Other adjustments	(87)
Cash payments	(273)
Balance at June 30, 2012	$ 0

The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

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Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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