XML 50 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
New Accounting Pronouncements (Condensed Consolidated Statement of Income) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Condensed Consolidated Statements Of Income (Loss) [Abstract]        
Revenues $ 660,591 $ 619,611 $ 1,268,727 $ 1,177,514
Cost of sales 606,292 560,127 1,156,110 1,070,498
Income tax expense 2,403 3,121 43,559 4,223
Net income (loss) $ 10,943 $ 18,074 $ (12,698) $ 26,629
Earnings Per Share [Abstract]        
Basic $ 0.23 $ 0.36 $ (0.26) $ 0.54
Diluted $ 0.23 $ 0.36 $ (0.26) $ 0.53
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Basic 47,451 49,766 47,981 49,640
Diluted 47,631 50,239 47,981 50,209
Accounting Standards Update 2014-09 [Member] | As Previously Reported [Member] | Calculated Under Revenue Guidance In Effect Before Topic 606 [Member]        
Condensed Consolidated Statements Of Income (Loss) [Abstract]        
Revenues   $ 616,904   $ 1,183,405
Cost of sales   558,317   1,075,758
Income tax expense   3,122   4,620
Net income (loss)   $ 17,176   $ 26,863
Earnings Per Share [Abstract]        
Basic   $ 0.35   $ 0.54
Diluted   $ 0.34   $ 0.54
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Basic   49,766   49,640
Diluted   50,239   50,209
Accounting Standards Update 2014-09 [Member] | Restatement Adjustment [Member] | Adjustments [Member]        
Condensed Consolidated Statements Of Income (Loss) [Abstract]        
Revenues   $ 2,707   $ (5,891)
Cost of sales   1,810   (5,260)
Income tax expense   (1)   (397)
Net income (loss)   $ 898   $ (234)
Earnings Per Share [Abstract]        
Basic   $ 0.01   $ 0
Diluted   $ 0.02   $ (0.01)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]        
Basic   49,766   49,640
Diluted   50,239   50,209