Financial Instruments - Financial Instruments Measured at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Carrying Value [Member]
Financial Instruments And Fair Value Measurements [Line Items]
Cash and cash equivalents	$ 35,853	$ 29,576
Loans payable	(56,801)	(48,599)
7.875% Senior Notes	(250,000)	(250,000)
6.50% Convertible Senior Notes, net of unamortized discounts		(34,417)
Revolving credit facility	(19,509)	(2,596)
Other long-term notes payable	(5,421)	(4,731)
Foreign currency forward contracts, net	(2,467)	(4,758)
Total Fair Value [Member]
Financial Instruments And Fair Value Measurements [Line Items]
Cash and cash equivalents	35,853	29,576
Loans payable	(56,801)	(48,599)
7.875% Senior Notes	(262,500)	(231,500)
6.50% Convertible Senior Notes, net of unamortized discounts		(34,803)
Revolving credit facility	(19,936)	(2,634)
Other long-term notes payable	(4,511)	(3,937)
Foreign currency forward contracts, net	(2,467)	(4,758)
Level 1 [Member]
Financial Instruments And Fair Value Measurements [Line Items]
Cash and cash equivalents	35,853	29,576
Loans payable
7.875% Senior Notes
6.50% Convertible Senior Notes, net of unamortized discounts
Revolving credit facility
Other long-term notes payable
Foreign currency forward contracts, net
Level 2 [Member]
Financial Instruments And Fair Value Measurements [Line Items]
Cash and cash equivalents
Loans payable	(56,801)	(48,599)
7.875% Senior Notes	(262,500)	(231,500)
6.50% Convertible Senior Notes, net of unamortized discounts		(34,803)
Revolving credit facility	(19,936)	(2,634)
Other long-term notes payable	(4,511)	(3,937)
Foreign currency forward contracts, net	(2,467)	(4,758)
Level 3 [Member]
Financial Instruments And Fair Value Measurements [Line Items]
Cash and cash equivalents
Loans payable
7.875% Senior Notes
6.50% Convertible Senior Notes, net of unamortized discounts
Revolving credit facility
Other long-term notes payable
Foreign currency forward contracts, net