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Unaudited Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Data

Unaudited summarized financial data by quarter for the years ended December 31, 2015 and 2014 is shown below.

 

     First
Quarter		      Second
Quarter		      Third
Quarter		      Fourth
Quarter		  
     (In thousands, except per share data)  

2015

            

Revenues

    $ 620,056       $ 634,032       $ 609,742       $ 555,563   

Operating (loss) income (1)

      (269,530 )       134,121         181,434         (340,099 ) 

(Loss) income before income tax expense

      (287,118 )       106,028         159,767         (360,025 ) 

Net (loss) income

      (255,709 )       90,386         136,422         (245,384 ) 

Net (loss) income per share, basic and diluted

    $ (1.86 )     $ 0.66       $ 0.99       $ (1.79 ) 

2014

            

Revenues

    $ 709,424       $ 692,244       $ 737,682       $ 675,321   

Operating income

      186,277         133,766         90,416         162,103   

Income before income tax expense

      167,679         112,603         81,639         153,270   

Net income

      145,810         89,713         52,645         98,843   

Net income per share, basic and diluted

    $ 1.05       $ 0.65       $ 0.38       $ 0.72   

 

(1)  During the first, third and fourth quarters of 2015, we recognized impairment losses of $358.5 million, $2.6 million and $499.4 million, respectively, aggregating $860.4 million for the year ended December 31, 2015 to write down certain of our drilling rigs with indicators of impairment to their estimated recoverable amounts. See Notes 1 and 2.