Total Income Tax (Benefit) Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current taxes
Federal taxes									$ (17,711)	$ 57	$ (464)
State taxes									140	640	329
Foreign taxes										506	164
Current taxes									(17,571)	1,203	29
Deferred taxes
Federal taxes										(376)	56
State taxes										537	(4,372)
Foreign taxes										(28)
Deferred taxes									0	133	(4,316)
Income tax (benefit) expense	$ (17,601)	$ (99)	$ 56	$ 73	$ 41	$ 3,330	$ (2,457)	$ (806)	$ (17,571)	$ 1,336	$ (4,287)