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Severance Costs (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended
	Dec. 03, 2013 Chief Executive Officer [Member]	Dec. 31, 2013 Chief Executive Officer [Member]	Sep. 30, 2014 Severance [Member]	Sep. 30, 2013 Severance [Member]	Sep. 30, 2014 Severance [Member]	Sep. 30, 2013 Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 714
Transition Costs		201
Restructuring Reserve [Roll Forward]
Balance at beginning of year			547	83	1,142	126
Provision for additional expense			0	0	313	1
Payments and adjustments			(313)	(16)	(1,221)	(60)
Balance at end of period			$ 234	$ 67	$ 234	$ 67

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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