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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Accumulated Deficit | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2013 | $ 1,813,428 | $ 725 | $ 3,769,429 | $ 30,078 | $ (213,898) | $ (1,924,244) | $ 151,338
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (6,372) |  |  |  | (6,372) |  |
Options exercised | 11,637 | 6 | 11,631 |  |  |  |
Cash dividends | (30,047) |  |  |  |  | (30,047) |
Shares issued in employee stock purchase plan | 1,324 |  | 1,324 |  |  |  |
Stock-based compensation, net of forfeitures | 15,289 | 5 | 14,382 |  |  |  | 902
Income tax benefit from stock-based compensation expense | 7,937 |  | 7,937 |  |  |  |
Net proceeds from the sale of Partnership units, net of tax | 125,733 |  | 74,521 |  |  |  | 51,212
Cash distribution to noncontrolling unitholders of the Partnership | (54,893) |  |  |  |  |  | (54,893)
Redemption of convertible debt | (15,007) | 1 | (234,219) |  | 219,211 |  |
Shares acquired from exercise of call options | 0 |  | 89,407 |  | (89,407) |  |
Shares issued for exercise of warrants | 0 |  | (6,851) |  | 6,851 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income | 97,915 |  |  |  |  | 79,023 | 18,892
Derivatives gain (loss), net of reclassifications to earnings and tax | (1,019) |  |  | (1,516) |  |  | 497
Adjustments from changes in ownership of Partnership | 65 |  |  | 65 |  |  |
Amortization of terminated interest rate swaps, net of tax | 2,255 |  |  | 2,255 |  |  |
Foreign currency translation adjustment | (6,519) |  |  | (6,519) |  |  |
Ending balance at Sep. 30, 2014 | 1,961,726 | 737 | 3,727,561 | 24,363 | (83,615) | (1,875,268) | 167,948
Beginning balance at Dec. 31, 2014 | 1,953,045 | 738 | 3,715,586 | 15,865 | (68,532) | (1,866,397) | 155,785
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (3,771) |  |  |  | (3,771) |  |
Options exercised | 1,106 | 1 | 1,105 |  |  |  |
Cash dividends | (31,167) |  |  |  |  | (31,167) |
Shares issued in employee stock purchase plan | 910 |  | 910 |  |  |  |
Stock-based compensation, net of forfeitures | 14,131 | 6 | 13,305 |  |  |  | 820
Income tax benefit from stock-based compensation expense | (42) |  | (42) |  |  |  |
Net proceeds from the sale of Partnership units, net of tax | 724 |  | 724 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (61,045) |  |  |  |  |  | (61,045)
Shares issued for exercise of warrants | 0 |  | (88) |  | 88 |  |
Adjustments from changes in ownership of Partnership | (9,972) |  | 17,662 |  |  |  | (27,634)
Comprehensive income (loss): |  |  |  |  |  |  |
Net income | 44,641 |  |  |  |  | 24,449 | 20,192
Derivatives gain (loss), net of reclassifications to earnings and tax | (7,304) |  |  | (3,496) |  |  | (3,808)
Adjustments from changes in ownership of Partnership | (223) |  |  | (223) |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,768 |  |  | 1,768 |  |  |
Foreign currency translation adjustment | (1,754) |  |  | (1,754) |  |  |
Ending balance at Sep. 30, 2015 | $ 1,901,047 | $ 745 | $ 3,749,162 | $ 12,160 | $ (72,215) | $ (1,873,115) | $ 84,310

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