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Earnings (Loss) Per Share, Calculation of EPS (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Sep. 07, 2012
Jun. 15, 2012
Mar. 23, 2012
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Numerator:                      
Income (loss) from continuing operations $ 6,828 $ 7,679 $ 14,120 $ (4,799) $ (31,171) $ 7,957 $ (10,477) $ 15,616 $ 23,828 $ (18,075) $ (9,438)
Income from discontinued operations, net of income taxes 22,727 885 952 673 (13,608) 987 13,092 1,012 25,237 1,483 1,760
Net income (loss) $ 29,555 $ 8,564 $ 15,072 $ (4,126) $ (44,779) $ 8,944 $ 2,615 $ 16,628 $ 49,065 $ (16,592) $ (7,678)
Weighted-average number of common shares outstanding—basic                 195,478,353 180,826,124 166,667,459
Denominator:                      
Weighted-average number of common shares outstanding—diluted                 195,862,506 180,826,124 166,667,459
Basic earnings (loss) per share:                      
Continuing operations (in dollars per share)                 $ 0.12 $ (0.10) $ (0.06)
Discontinued operations (in dollars per share)                 $ 0.13 $ 0.01 $ 0.01
Total (in dollars per share)                 $ 0.25 $ (0.09) $ (0.05)
Diluted earnings (loss) earnings per share:                      
Continuing operations (in dollars per share)                 $ 0.12 $ (0.10) $ (0.06)
Discontinued operations (in dollars per share)                 $ 0.13 $ 0.01 $ 0.01
Total (in dollars per share)                 $ 0.25 $ (0.09) $ (0.05)
Shares related to unvested MSUs [Member]
                      
Denominator:                      
Effect of dilutive securities:                 177,314 0 0
Shares related to unvested MSUs and PSUs [Member]
                      
Denominator:                      
Effect of dilutive securities:                 206,839 0 0