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Condensed Consolidated Statements of Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive Loss
Equity, beginning balance (Beginning balance previously reported) at Dec. 31, 2015 $ 900,983 $ 838 $ 1,163,985 $ (174,038) $ (89,802)
Equity, beginning balance (Adjustment for adoption of new accounting guidance) at Dec. 31, 2015 14,750 0 (58) 14,808 0
Equity, beginning balance (Beginning balance, as adjusted) at Dec. 31, 2015 915,733 838 1,163,927 (159,230) (89,802)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 4,888     4,888  
Changes in defined benefit pension plans 642       642
Changes in fair value of derivative 59       59
Repurchase Class A Common shares: 570,000 in 2016 and 81,091 in 2017 (10,131) (6) (8,889) (1,236)  
Compensation plans: 769,547 net shares issued in 2016 and 466,474 in 2017 [1] 7,052 8 7,044    
Other (7)       (7)
Equity, ending balance at Mar. 31, 2016 918,236 840 1,162,082 (155,578) (89,108)
Equity, beginning balance at Dec. 31, 2016 945,935 819 1,132,540 (94,077) (93,347)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (1,939)     (1,939)  
Changes in defined benefit pension plans 695       695
Changes in fair value of derivative 0        
Repurchase Class A Common shares: 570,000 in 2016 and 81,091 in 2017 (1,760) (1) (1,262) (497)  
Compensation plans: 769,547 net shares issued in 2016 and 466,474 in 2017 [1] 4,539 5 4,534    
Other (16)       (16)
Equity, ending balance at Mar. 31, 2017 $ 947,454 $ 823 $ 1,135,812 $ (96,513) $ (92,668)
[1] * Net of tax payments related to shares withheld for vested stock and RSUs of $3,287 in 2017 and $2,579 in 2016.