Debt - Debt (Detail)		12 Months Ended
	Feb. 26, 2013	Dec. 31, 2015	Dec. 31, 2014
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Average interest rate		3.75%	3.75%
Debt Instrument, Maturity Date	Mar. 01, 2020
6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Average interest rate		6.00%	6.00%
Secured Promissory Notes [Member]
Line of Credit Facility [Line Items]
Average interest rate		3.42%	3.17%
Other Indebtedness [Member]
Line of Credit Facility [Line Items]
Variable and fixed interest rates ranging, minimum		2.19%
Variable and fixed interest rates ranging, maximum		5.50%
Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Maturity Date	Jun. 01, 2022
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date		May 15, 2017
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Average interest rate		8.50%	8.50%
Second Amended Senior Secured Credit Facility [Member] [Member] | Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date		Sep. 14, 2017
Second Amended Senior Secured Credit Facility [Member] [Member] | Revolving Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Maturity Date		Sep. 14, 2015
6% Tangible Equity Units [Member] | Senior Notes [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date		Dec. 15, 2016