Debt (Details Textual) (USD $)	12 Months Ended			3 Months Ended				3 Months Ended							3 Months Ended			12 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Asset-Backed Revolving Credit Facility	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Revolving Credit Facility	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Revolving Credit Facility Variable Interest Rate Base Rate Option	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Revolving Credit Facility Variable Interest Rate Base Rate Option Federal Fund Rate	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Revolving Credit Facility Variable Interest Rate Base Rate Option One-Month LIBOR	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Revolving Credit Facility Variable Interest Rate LIBOR Rate Option [Member]	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Domestic Line of Credit	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Foreign Line of Credit	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Letter of Credit	Mar. 31, 2013 Asset-Backed Revolving Credit Facility Swingline Line of Credit	Mar. 31, 2012 Convertible Notes Due September 2013	Mar. 31, 2013 Senior Secured Notes 8.625% Senior Secured Notes Due February 2018	Mar. 31, 2013 Senior Secured Notes 8.625% Senior Secured Notes Due February 2018 Prior to February 2015	Mar. 31, 2013 Senior Secured Notes 8.625% Senior Secured Notes Due February 2018 Prior to February 2014	Mar. 31, 2013 Senior Secured Notes 10.5% Senior Secured Notes Due 2013	Mar. 31, 2013 Convertible Senior Subordinated Notes [Member]	Mar. 31, 2013 Convertible Senior Subordinated Notes [Member] Surety Bond	Mar. 31, 2013 Convertible Senior Subordinated Notes [Member] Convertible Notes Due September 2013	Mar. 31, 2013 Convertible Senior Subordinated Notes [Member] Convertible Notes Due September 2013 Three-Month LIBOR
Debt Instrument [Line Items]
Short-term borrowings	$ 22,017,000	$ 20,014,000
Renewable period of borrowing facilities	1 year
Interest rate description on borrowings	interest at current local market rates plus up to one percent per annum
Weighted average interest rate on short-term borrowings	5.50%	5.40%
Total debt	776,000,000	776,700,000
Debt instrument face amount														675,000,000.0						60,000,000.0
Interest rate, stated percentage														8.625%			10.50%
Line of credit maximum borrowing capacity				200,000,000.0						40,000,000.0	75,000,000.0	25,000,000.0
Notes at redemption price percentage of principal amount															100.00%
Percentage of redemption allowable in period															10.00%	35.00%
Redemption price percentage on 10% redemption															103.00%
Redemption price percentage on 35% redemption																108.625%
Redemption allowable under percentage of principal amount outstanding														65.00%
Period of redemption notice limit														60 days
Repurchase price upon change in control of the company percent														101.00%
Increase in the revolving credit commitments available per accordion feature				50,000,000.0
Aggregate revolving credit commitment including accordion feature				250,000,000.0
Basis spread on variable rate						0.50%	1.00%														(1.50%)
Stated percentage rate range, minimum					1.80%			2.80%
Stated percentage rate range, maximum					2.30%			3.30%
Borrowing base percentage requirement									0.85	0.85
Borrowing base on eligible inventory									85.00%	85.00%
Minimum fixed charge coverage ratio			1.00
Excess availability benchmark decrease			30,000,000.0
Excess availability benchmark decrease percentage			15.00%
Interest rate payable quarterly													0.00%							0.00%
Interest payable quarterly																				10.00%
Letter of credit sub-facility																		46,800,000
Surety bonds face value																			53,800,000
Maximum repayment period of letters of credit	1 year																	1 year
Collateralized agreements																			$ 24,300,000
Common stock converstion rate																				0.0616143
Convertible conversion ratio if change in control																				0.0702247