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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Capital in Excess of Par Value | Retained Earnings (Deficit) | Accumulated Other Comprehensive Income (Loss) | Common Stock in Treasury | Total CONSOL Energy Inc. Stockholders' Equity | Non-Controlling Interest
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, Beginning of Period at Dec. 31, 2013 | $ 5,006,289 | $ 2,294 | $ 2,364,592 | $ 2,964,520 | $ (325,117) | $ 0 | $ 5,006,289 | $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net Income (Loss) | 163,090 | 0 | 0 | 163,090 | 0 | 0 | 163,090 | 0
Gas Cash Flow Hedge | (79,028) | 0 | 0 | 0 | (79,028) | 0 | (79,028) | 0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent | 94,989 | 0 | 0 | 0 | 94,989 | 0 | 94,989 | 0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 337,107 | 0 | 0 | 163,090 | 174,017 | 0 | 337,107 | 0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | 337,107 |  |  |  |  |  |  |
Issuance of Treasury Stock | (15,954) | 0 | 0 | (15,954) | 0 | 0 | (15,954) | 0
Proceeds from Issuance of Common Stock | 15,016 | 12 | 15,004 | 0 | 0 | 0 | 15,016 | 0
Amortization of Stock-Based Compensation Awards | 41,877 | 0 | 41,877 | 0 | 0 | 0 | 41,877 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 0 |  |  |  |  |  |  |
Dividends | 57,506 | 0 | 0 | 57,506 | 0 | 0 | 57,506 | 0
Balance, End of Period at Dec. 31, 2014 | 5,329,458 | 2,306 | 2,424,102 | 3,054,150 | (151,100) | 0 | 5,329,458 | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 174,017 |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation | 2,629 | 0 | 2,629 | 0 | 0 | 0 | 2,629 | 0
Net Income (Loss) | (364,475) | 0 | 0 | (374,885) | 0 | 0 | (374,885) | 10,410
Gas Cash Flow Hedge | 78,051 | 0 | 0 | 0 | 78,051 | 0 | 78,051 | 0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent | (86,447) | 0 | 0 | 0 | (86,447) | 0 | (86,447) | 0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | (539,383) | 0 | 0 | (374,885) | (164,498) | 0 | (539,383) | 10,410
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (528,973) |  |  |  |  |  |  |
Issuance of Treasury Stock | (12,181) | 0 | 0 | (12,181) | 0 | 0 | (12,181) | 0
Proceeds from Issuance of Common Stock | 8,288 | 10 | 8,278 | 0 | 0 | 0 | 8,288 | 0
Stock Repurchased During Period, Value | (71,674) | (22) | (17,683) | (53,969) | 0 | 0 | (71,674) | 0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation | (3,706) | 0 | (3,706) | 0 | 0 | 0 | (3,706) | 0
Amortization of Stock-Based Compensation Awards | 24,506 | 0 | 24,506 | 0 | 0 | 0 | 24,506 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (5,060) | 0 | 0 | 0 | 0 | 0 | 0 | (5,060)
Net Change in Noncontrolling Interest | 148,399 | 0 | 0 | 0 | 0 | 0 | 0 | 148,399
Dividends | 33,281 | 0 | 0 | 33,281 | 0 | 0 | 33,281 | 0
Balance, End of Period at Dec. 31, 2015 | 4,855,776 | 2,294 | 2,435,497 | 2,579,834 | (315,598) | 0 | 4,702,027 | 153,749
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (164,498) |  |  |  |  |  |  |
Net Income (Loss) | (839,148) |  |  |  |  |  |  |
Gas Cash Flow Hedge | 43,470 | 0 | 0 | 0 | 43,470 | 0 | 43,470 | 0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent | (33,226) | 0 | 0 | 0 | (33,488) | 0 | (33,488) | (262)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | (925,060) |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | (915,844) | 0 | 0 | (848,102) | (76,958) | 0 | (925,060) | 9,216
Stock Granted, Value, Share-based Compensation, Forfeited | (1,649) | 0 | 0 | (1,649) | 0 | 0 | (1,649) | 0
Proceeds from Issuance of Common Stock | 4 | 4 | 0 | 0 | 0 | 0 | 4 | 0
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation | (4,931) | 0 | (4,931) | 0 | 0 | 0 | (4,931) | 0
Amortization of Stock-Based Compensation Awards | 31,483 | 0 | 30,298 | 0 | 0 | 0 | 30,298 | 1,185
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (21,657) |  |  |  |  |  |  |
Net Change in Noncontrolling Interest | (21,657) | 0 | 0 | 0 | 0 | 0 | 0 | (21,657)
Dividends | 2,294 | 0 | 0 | (2,294) | 0 | 0 | (2,294) | 0
Balance, End of Period at Dec. 31, 2016 | 3,940,888 | $ 2,298 | $ 2,460,864 | $ 1,727,789 | $ (392,556) | $ 0 | $ 3,798,395 | $ 142,493
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | $ (76,696) |  |  |  |  |  |  |

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