Comparison of Actual Results of Operations and Unaudited Pro Forma Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Business Acquisition, Pro Forma Information [Line Items]      
Revenue $ 529,398 $ 622,853 $ 454,164 [1]
Net (loss) income $ (133,693) $ 26,515 $ 22,529 [1]
Net (loss) income per share:      
Basic $ (5.43) $ 1.11 $ 1.09 [1]
Diluted $ (5.43) $ 1.00 $ 1.02 [1]
[1] The 2011 pro forma financial information above includes the 2012 and 2011 acquisitions as if they had occurred as of January 1, 2011.