XML 38 R20.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Accounting Policies [Abstract] |
Summary of Other Current Assets | Other current assets at December 31, 2015 and 2016 consist of the following:
|  | As of December 31, |
|  | 2015 |  |  | 2016 |
|  |  | (In thousands) |
Pipe and oil field equipment inventory |  | $ | 1,198 |  |  | $ | 1,183 |
Other |  |  | 795 |  |  |  | 641 |
|  | $ | 1,993 |  |  | $ | 1,824 |
Summary of Financial Assets and Liabilities at Fair Value | The following table summarizes financial assets and liabilities accounted for at fair value as of December 31, 2016:
| Carrying Value Measured at Fair Value at December 31, 2016 |  |  | Level 1 |  |  | Level 2 |
| (In thousands) |
Items measured at fair value on a recurring basis: |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 65,904 |  |  | $ | 65,904 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | 6,030 |  |  | $ | — |  |  | $ | 6,030 |
Schedule of Fair Value Impairments, Average Prices of Oil and Gas Properties And Applicable Discount Rates | The following table presents the fair value and impairments recorded by the Company in the third quarter and fourth quarter of 2015, as well as the average oil price per barrel and gas price per thousand cubic feet over the life of the properties and the applicable discount rates utilized in the Company's assessments:
|  | Fair Value |  |  | Impairment |  |  |  | Management's Price Outlook |  |  | Annual Discount Rate |
| Oil |  |  | Gas
|  | (In thousands) |  |  |  | (Per barrel) |  |  | (Per Mcf) |  |  |  |
Impairments recorded at September 30, 2015:
Oil properties |  |  | $330,257 |  |  |  | $405,308 |  |  |  | $73.70 |  |  | $4.04 |  |  | 10%-20% |
Natural gas properties |  |  | $61,625 |  |  |  | $139,406 |  |  |  | $75.91 |  |  | $3.91 |  |  | 10%-20% |
Impairments recorded at December 31, 2015: |
Oil properties |  |  | $3,030 |  |  |  | $16,036 |  |  |  | $73.48 |  |  |  |  |  | 10%-20% |
Natural gas properties |  |  | $123,926 |  |  |  | $238,210 |  |  |  | $70.76 |  |  | $3.74 |  |  | 10%-20% |
Summary of Accrued Expenses | Accrued expenses at December 31, 2015 and 2016 consist of the following:
|  | As of December 31, |
|  | 2015 |  |  | 2016 |
|  | (In thousands) |
Accrued interest payable |  | $ | 29,075 |  |  | $ | 22,721 |
Accrued drilling costs |  |  | 5,306 |  |  |  | 7,498 |
Accrued employee compensation |  |  | 107 |  |  |  | 6,292 |
Accrued transportation costs |  |  | 2,818 |  |  |  | 2,227 |
Other |  |  | 1,138 |  |  |  | 1,628 |
|  | $ | 38,444 |  |  | $ | 40,366 |
Summary of Changes in Reserve for Future Abandonment Costs | The following table summarizes the changes in the Company's total estimated liability:
|  | 2015 |  |  | 2016 |
|  | (In thousands) |
Reserve for Future Abandonment Costs at beginning of the year |  | $ | 14,900 |  |  | $ | 20,093 |
New wells placed on production |  |  | 310 |  |  |  | 3 |
Changes in estimates and timing |  |  | 4,927 |  |  |  | (553 | )
Liabilities settled |  |  | (89 | ) |  |  | (409 | )
Asset divestitures |  |  | (628 | ) |  |  | (4,268 | )
Accretion expense |  |  | 673 |  |  |  | 938 |
Reserve for Future Abandonment Costs at end of the year |  | $ | 20,093 |  |  | $ | 15,804 |
Basic and Diluted Earnings Per Share | Basic and diluted earnings per share for 2014, 2015 and 2016 were determined as follows:
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | Income (Loss) |  |  | Shares |  |  | Per Share |  |  | Loss |  |  | Shares |  |  | Per Share |  |  | Loss |  |  | Shares |  |  | Per Share |
|  | (In thousands except per share data) |
Net Loss |  | $ | (57,111 | ) |  |  |  |  |  |  |  |  |  | $ | (1,047,109 | ) |  |  |  |  |  |  |  |  |  | $ | (135,134 | ) |  |  |  |  |  |  |  |
Income Allocable to Unvested Stock Grants |  |  | (595 | ) |  |  |  |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  |  |
Basic and Diluted Net Loss Attributable to Common Stock |  | $ | (57,706 | ) |  |  | 9,309 |  |  | $ | (6.20 | ) |  | $ | (1,047,109 | ) |  |  | 9,223 |  |  | $ | (113.53 | ) |  | $ | (135,134 | ) |  |  | 11,729 |  |  | $ | (11.52 | )
Weighted Average Shares of Unvested Restricted Stock | Weighted average shares of unvested restricted stock included in common stock outstanding were as follows:
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | (In thousands) |
Unvested restricted stock |  |  | 238 |  |  |  | 293 |  |  |  | 344 |
Common Stock Stock Options and Convertible Stock Anti-Dilutive to Earnings Excluded from Weighted Average Shares Used in Computation of Earning Per Share | All stock options, unvested PSUs, warrants exercisable into common stock and contingently issuable shares related to the convertible debt that were anti-dilutive to earnings and excluded from weighted average shares used in the computation of earnings per share due to the net loss in each period were as follows:
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | (In thousands except per share data) |
Weighted average anti-dilutive stock options |  |  | 23 |  |  |  | 20 |  |  |  | 11 |
Weighted average exercise price per share |  | $ | 164.50 |  |  | $ | 164.75 |  |  | $ | 166.10 |
Weighted average warrants for common stock |  |  | — |  |  |  | — |  |  |  | 337 |
Weighted average exercise price per share |  | $ | — |  |  | $ | — |  |  | $ | 0.01 |
Weighted average PSUs |  |  | 100 |  |  |  | 136 |  |  |  | 136 |
Weighted average grant date fair value per unit |  | $ | 99.40 |  |  | $ | 35.35 |  |  | $ | 22.17 |
Weighted average contingently convertible shares |  |  | — |  |  |  | — |  |  |  | 11,574 |
Weighted average conversion price per share |  | $ | — |  |  | $ | — |  |  | $ | 12.32 |
Cash Payments Made for Interest and Income Taxes | Cash payments made for interest and income taxes for the years ended December 31, 2014, 2015 and 2016, respectively, were as follows:
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | (In thousands) |
Cash payments for: |  |  |  |  |  |  |  |  |  |  |  |
Interest |  | $ | 62,812 |  |  | $ | 94,177 |  |  | $ | 105,449 |
Income taxes |  | $ | 682 |  |  | $ | 77 |  |  | $ | — |

X
- Definition Cash payments made for interest and income taxes. + References No definition available. + Details
Name: | crk_CashPaymentsMadeForInterestAndIncomeTaxesTableTextBlock
Namespace Prefix: | crk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of fair value, impairments and average prices of oil and gas properties. + References No definition available. + Details
Name: | crk_ScheduleOfFairValueImpairmentsAndAveragePricesOfOilAndGasPropertiesTableTextBlock
Namespace Prefix: | crk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average shares of unvested restricted stock. + References No definition available. + Details
Name: | crk_WeightedAverageSharesOfUnvestedRestrictedStockTableTextBlock
Namespace Prefix: | crk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration