Debt - Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Debt	$ 357,407	$ 294,063
Senior Secured Credit Facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt		44,000
6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Debt	25,619
Term Loan Facility [Member] | Senior Secured Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt	200,000	200,000
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt	99,890
Secured Promissory Notes [Member]
Line of Credit Facility [Line Items]
Debt	15,400	34,171
Other Indebtedness [Member]
Line of Credit Facility [Line Items]
Debt	$ 16,498	$ 15,892