Income Per Share - Redemption of Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Sep. 30, 2013	May. 30, 2015	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014	Oct. 27, 2015
Conversion of redeemable preference shares
Redemption percentage of the liquidation preference per share	105.00%
Liquidation preference (in dollars per share)	$ 100
Liquidation preference	$ 199,937
Par value of common stock (in dollars per share)	$ 1.00		$ 1	$ 1		$ 1.00
Market value of common stock issued upon redemption of preferred stock			$ 64,089	$ 20
Closing price per share (in dollars per share)	4.76
Conversion of Series G and H preferred stock					$ 25,603
8.5% convertible notes due May 2015
Convertible notes due 2015
Convertible notes amount		$ 64,089
Debt instrument, stated interest rate (as a percent)		8.50%	8.50%	8.50%
Shares issued		24,762,000
Preferred Stock (Series G and H)
Conversion of redeemable preference shares
Contracted conversion rate (in dollars per share)	$ 5.50
Total common stock shares issuable at contracted conversion rate	34,621,117
Conversion of Series G and H preferred stock	$ 25,603
Diluted earning per share due to conversion of preferred stock (in dollars per share)	$ 0.03
Common stock issued on conversion of preferred stock (in shares)	5,378,883
Common Stock
Conversion of redeemable preference shares
Common stock issued upon redemption of preferred stock (in shares)	40,000,000
Market value of common stock issued upon redemption of preferred stock	$ 190,400