Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Restricted Stock Awards) (Details)

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STOCK-BASED COMPENSATION (Restricted Stock Awards) (Details) - Restricted Stock [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Summary of restricted stock [Roll Forward]      
Unvested at beginning of period (in shares) 1,171 2,210 3,202
Granted (in shares) 456 752 548
Forfeited (in shares) (6) (237) (141)
Vested (in shares) (760) (1,554) (1,399)
Unvested at end of period (in shares) 861 1,171 2,210
Summary of restricted stock awards, additional disclosures [Abstract]      
Price, Unvested at beginning of period (in dollars per share) $ 16.18 $ 10.68 $ 10.32
Price, Granted (in dollars per share) 26.11 21.64 12.17
Price, Forfeited (in dollars per share) 10.02 12.64 9.19
Price, Vested (in dollars per share) 14.74 11.50 10.54
Price, Unvested at end of period (in dollars per share) $ 22.67 $ 16.18 $ 10.68