Calculations of Net Loss Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net loss	$ (19,430)	$ (8,757)	$ (59,492)	$ (28,554)
Weighted average common shares outstanding, Basic and diluted (in shares)	21,494	20,999	21,245	20,935
Net loss per share, Basic and diluted (in dollars per share)	$ (0.90)	$ (0.42)	$ (2.80)	$ (1.36)

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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