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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
--- | --- | --- | --- | --- | --- | --- | ---
Balance, value at Dec. 31, 2012 | $ 1,675,841 | $ 713 | $ 3,710,758 | $ 28,342 | $ (209,359) | $ (2,078,259) | $ 223,646
Balance (in shares) at Dec. 31, 2012 |  | 71,291,230 |  |  | 6,376,426 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased, value | (4,539) |  |  |  | $ (4,539) |  |
Treasury stock purchased (in shares) |  |  |  |  | (173,267) |  |
Options exercised, value | 8,321 | $ 4 | 8,317 |  |  |  |
Options exercised (in shares) |  | 459,416 |  |  |  |  |
Shares issued in employee stock purchase plan, value | 1,632 | $ 1 | 1,631 |  |  |  |
Shares issued in employee stock purchase plan (in shares) |  | 66,259 |  |  |  |  |
Stock-based compensation, net of forfeitures, value | 16,248 | $ 7 | 15,509 |  |  |  | 732
Stock-based compensation, net of forfeitures, shares |  | 683,868 |  |  | (32,375) |  |
Income tax benefit from stock-based compensation expense | 1,782 |  | 1,782 |  |  |  |
Adjustments from changes in ownership of Partnership | (17,665) |  | 31,573 |  |  |  | (49,238)
Cash distribution to noncontrolling unitholders of the Partnership | (61,959) |  |  |  |  |  | (61,959)
Other | (141) |  | (141) |  |  |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 126,606 |  |  |  |  | 94,028 | 32,578
Derivatives gain (loss), net of reclassifications to earnings and tax | 5,207 |  |  | (372) |  |  | 5,579
Adjustments from changes in ownership of Partnership | (703) |  |  | (703) |  |  |
Amortization of terminated interest rate swaps, net of tax | 2,713 |  |  | 2,713 |  |  |
Foreign currency translation adjustment | 7,566 |  |  | 7,566 |  |  |
Balance, value at Dec. 31, 2013 | 1,760,909 | $ 725 | 3,769,429 | 37,546 | $ (213,898) | (1,984,231) | 151,338
Balance (in shares) at Dec. 31, 2013 |  | 72,500,773 |  |  | 6,582,068 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 32,763 |  |  |  |  | 30,465 |
Derivatives gain (loss), net of reclassifications to earnings and tax | (570) |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 780 |  |  |  |  |  |
Foreign currency translation adjustment | 776 |  |  |  |  |  |
Balance, value at Mar. 31, 2014 | 1,786,040 |  |  | 38,506 |  | (1,963,755) |
Balance, value at Dec. 31, 2013 | 1,760,909 | $ 725 | 3,769,429 | 37,546 | $ (213,898) | (1,984,231) | 151,338
Balance (in shares) at Dec. 31, 2013 |  | 72,500,773 |  |  | 6,582,068 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 51,476 |  |  |  |  | 40,692 |
Derivatives gain (loss), net of reclassifications to earnings and tax | (2,220) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | 65 |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,529 |  |  |  |  |  |
Foreign currency translation adjustment | (1,430) |  |  |  |  |  |
Balance, value at Jun. 30, 2014 | 1,890,110 |  |  | 36,300 |  | (1,963,529) |
Balance, value at Dec. 31, 2013 | 1,760,909 | $ 725 | 3,769,429 | 37,546 | $ (213,898) | (1,984,231) | 151,338
Balance (in shares) at Dec. 31, 2013 |  | 72,500,773 |  |  | 6,582,068 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 93,512 |  |  |  |  | 74,620 |
Derivatives gain (loss), net of reclassifications to earnings and tax | (1,019) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | 65 |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 2,255 |  |  |  |  |  |
Foreign currency translation adjustment | (5,999) |  |  |  |  |  |
Balance, value at Sep. 30, 2014 | 1,905,324 |  |  | 32,351 |  | (1,939,658) |
Balance, value at Dec. 31, 2013 | 1,760,909 | $ 725 | 3,769,429 | 37,546 | $ (213,898) | (1,984,231) | 151,338
Balance (in shares) at Dec. 31, 2013 |  | 72,500,773 |  |  | 6,582,068 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased, value | (7,044) |  |  |  | $ (7,044) |  |
Treasury stock purchased (in shares) |  |  |  |  | (172,232) |  |
Options exercised, value | 12,819 | $ 7 | 12,812 |  |  |  |
Options exercised (in shares) |  | 729,685 |  |  |  |  |
Cash dividends | (40,319) |  |  |  |  | (40,319) |
Shares issued in employee stock purchase plan, value | 1,812 |  | 1,812 |  |  |  |
Shares issued in employee stock purchase plan (in shares) |  | 50,232 |  |  |  |  |
Stock-based compensation, net of forfeitures, value | 19,016 | $ 5 | 17,844 |  |  |  | 1,167
Stock-based compensation, net of forfeitures, shares |  | 466,011 |  |  | (42,213) |  |
Income tax benefit from stock-based compensation expense | 6,586 |  | 6,586 |  |  |  |
Adjustments from changes in ownership of Partnership | 125,733 |  | 74,521 |  |  |  | 51,212
Cash distribution to noncontrolling unitholders of the Partnership | (74,856) |  |  |  |  |  | (74,856)
Redemption of convertible debt, value | (15,007) | $ 1 | (234,219) |  | $ 219,211 |  |
Redemption of convertible debt (in shares) |  | 61,499 |  |  | 6,711,587 |  |
Shares acquired from exercise of call options, value | 0 |  | 89,407 |  | $ (89,407) |  |
Shares acquired from exercise of call options (in shares) |  |  |  |  | (6,522,301) |  |
Shares issued for exercise of warrants, value | 0 |  | (22,606) |  | $ 22,606 |  |
Shares issued for exercise of warrants (in shares) |  |  |  |  | 1,644,214 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 88,661 |  |  |  |  | 60,945 | 27,716
Derivatives gain (loss), net of reclassifications to earnings and tax | (3,366) |  |  | (2,574) |  |  | (792)
Adjustments from changes in ownership of Partnership | 65 |  |  | 65 |  |  |
Amortization of terminated interest rate swaps, net of tax | 2,944 |  |  | 2,944 |  |  |
Foreign currency translation adjustment | (12,147) |  |  | (12,147) |  |  |
Balance, value at Dec. 31, 2014 | 1,865,806 | $ 738 | 3,715,586 | 25,834 | $ (68,532) | (1,963,605) | 155,785
Balance (in shares) at Dec. 31, 2014 |  | 73,808,200 |  |  | 4,963,013 |  |
Balance, value at Mar. 31, 2014 | 1,786,040 |  |  | 38,506 |  | (1,963,755) |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 18,713 |  |  |  |  |  |
Derivatives gain (loss), net of reclassifications to earnings and tax | (1,650) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | 65 |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 749 |  |  |  |  |  |
Foreign currency translation adjustment | (2,206) |  |  |  |  |  |
Balance, value at Jun. 30, 2014 | 1,890,110 |  |  | 36,300 |  | (1,963,529) |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 42,036 |  |  |  |  |  |
Derivatives gain (loss), net of reclassifications to earnings and tax | 1,201 |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | 0 |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 726 |  |  |  |  |  |
Foreign currency translation adjustment | (4,569) |  |  |  |  |  |
Balance, value at Sep. 30, 2014 | 1,905,324 |  |  | 32,351 |  | (1,939,658) |
Balance, value at Dec. 31, 2014 | 1,865,806 | $ 738 | 3,715,586 | 25,834 | $ (68,532) | (1,963,605) | 155,785
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 39,970 |  |  |  |  | 31,027 |
Derivatives gain (loss), net of reclassifications to earnings and tax | (4,650) |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 635 |  |  |  |  |  |
Foreign currency translation adjustment | (7,745) |  |  |  |  |  |
Balance, value at Mar. 31, 2015 | 1,865,844 |  |  | 17,047 |  | (1,942,918) |
Balance, value at Dec. 31, 2014 | 1,865,806 | $ 738 | 3,715,586 | 25,834 | $ (68,532) | (1,963,605) | 155,785
Balance (in shares) at Dec. 31, 2014 |  | 73,808,200 |  |  | 4,963,013 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 24,972 |  |  |  |  | 6,851 |
Derivatives gain (loss), net of reclassifications to earnings and tax | (3,228) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | (223) |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,225 |  |  |  |  |  |
Foreign currency translation adjustment | (4,420) |  |  |  |  |  |
Balance, value at Jun. 30, 2015 | 1,822,664 |  |  | 20,501 |  | (1,977,497) |
Balance, value at Dec. 31, 2014 | 1,865,806 | $ 738 | 3,715,586 | 25,834 | $ (68,532) | (1,963,605) | 155,785
Balance (in shares) at Dec. 31, 2014 |  | 73,808,200 |  |  | 4,963,013 |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | 17,133 |  |  |  |  | (3,059) |
Derivatives gain (loss), net of reclassifications to earnings and tax | (7,304) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | (223) |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,768 |  |  |  |  |  |
Foreign currency translation adjustment | 4,218 |  |  |  |  |  |
Balance, value at Sep. 30, 2015 | 1,792,272 |  |  | 28,101 |  | (1,997,831) |
Balance, value at Dec. 31, 2014 | 1,865,806 | $ 738 | 3,715,586 | 25,834 | $ (68,532) | (1,963,605) | 155,785
Balance (in shares) at Dec. 31, 2014 |  | 73,808,200 |  |  | 4,963,013 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased, value | $ (3,985) |  |  |  | $ (3,985) |  |
Treasury stock purchased (in shares) | (137,994) |  |  |  | (137,994) |  |
Options exercised, value | $ 1,106 | $ 1 | 1,105 |  |  |  |
Options exercised (in shares) |  | 89,759 |  |  |  |  |
Cash dividends | (41,584) |  |  |  |  | (41,584) |
Shares issued in employee stock purchase plan, value | 910 |  | 910 |  |  |  |
Shares issued in employee stock purchase plan (in shares) |  | 28,693 |  |  |  |  |
Stock-based compensation, net of forfeitures, value | 17,648 | $ 11 | 16,473 |  |  |  | 1,164
Stock-based compensation, net of forfeitures, shares |  | 1,087,656 |  |  | (289,335) |  |
Income tax benefit from stock-based compensation expense | (478) |  | (478) |  |  |  |
Adjustments from changes in ownership of Partnership | (9,972) |  | 17,662 |  |  |  | (27,634)
Net proceeds from the sale of Partnership units, net of tax | 724 |  | 724 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (81,779) |  |  |  |  |  | (81,779)
Shares issued for exercise of warrants, value |  |  | (88) |  | $ 88 |  |
Shares issued for exercise of warrants (in shares) |  |  |  |  | 6,372 |  |
Spin-off of Exterran Corporation, value | (836,157) |  | (806,997) | (29,160) |  |  |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | (125,697) |  |  |  |  | (132,549) | 6,852
Derivatives gain (loss), net of reclassifications to earnings and tax | (3,465) |  |  | (2,426) |  |  | (1,039)
Adjustments from changes in ownership of Partnership | (223) |  |  | (223) |  |  |
Amortization of terminated interest rate swaps, net of tax | 1,990 |  |  | 1,990 |  |  |
Foreign currency translation adjustment | 2,415 |  |  | 2,415 |  |  |
Balance, value at Dec. 31, 2015 | 787,259 | $ 750 | $ 2,944,897 | (1,570) | $ (72,429) | (2,137,738) | $ 53,349
Balance (in shares) at Dec. 31, 2015 |  | 75,014,308 |  |  | 5,383,970 |  |
Balance, value at Mar. 31, 2015 | 1,865,844 |  |  | 17,047 |  | (1,942,918) |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | (14,998) |  |  |  |  |  |
Derivatives gain (loss), net of reclassifications to earnings and tax | 1,422 |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | (223) |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 590 |  |  |  |  |  |
Foreign currency translation adjustment | 3,325 |  |  |  |  |  |
Balance, value at Jun. 30, 2015 | 1,822,664 |  |  | 20,501 |  | (1,977,497) |
Comprehensive income (loss): |  |  |  |  |  |  |
Net income (loss) | (7,839) |  |  |  |  |  |
Derivatives gain (loss), net of reclassifications to earnings and tax | (4,076) |  |  |  |  |  |
Adjustments from changes in ownership of Partnership | 0 |  |  |  |  |  |
Amortization of terminated interest rate swaps, net of tax | 543 |  |  |  |  |  |
Foreign currency translation adjustment | 8,638 |  |  |  |  |  |
Balance, value at Sep. 30, 2015 | $ 1,792,272 |  |  | $ 28,101 |  | $ (1,997,831) |

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