Right Agreement - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Jul. 23, 2009	Sep. 30, 2014	Jul. 23, 2009 Right
Class of Warrant or Right [Line Items]
Rights granted against each share outstanding	1		1
Preferred Stock, par value	$ 1.00		$ 1.00
Rights Exercisable as Units, Component Description	Unit consisting of one one-hundredth of a share (a "Fractional Share") of Series A Junior Participating Preferred Stock, par value $1.00 per share, of the Company (the "Preferred Shares"), at a purchase price of $130.00 per Fractional Share, subject to adjustment
Preferred Stock, purchase price		$ 130.00
Distribution date following public announcement		10 days
Distribution date following commencement of tender		10 days
Common stock acquisition beneficial ownership recognized percentage		15.00%
Fractional Share		0.01
After flip- in event recognized percentage		50.00%
Conversion ratio of common stock		1
Flip - Over Event
Class of Warrant or Right [Line Items]
Percentage of assets cash flow or earning power		50.00%