XML 82 R64.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Income Taxes - Valuation Allowances Recognized and Related Tax Effect (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Federal valuation allowance | $ 132,482 | $ 775,304 |
Federal tax effect | 46,369 | 271,356 |
State valuation allowance | 434,561 | 264,188 | $ 213,066
State tax effect | $ 23,521 | $ 12,228 | $ 11,099

X
- Definition Additional federal valuation allowance on net operating loss carryforwards and other federal tax assets. + References No definition available. + Details
Name: | crk_AdditionalFederalValuationAllowanceOnNetOperatingLossCarryforwardsAndOtherFederalTaxAssets
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Additional state valuation allowance on net operating loss carryforwards. + References No definition available. + Details
Name: | crk_AdditionalStateValuationAllowanceOnNetOperatingLossCarryforwards
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax effect of additional federal valuation allowance on net operating loss carryforwards and other federal tax assets. + References No definition available. + Details
Name: | crk_TaxEffectOfAdditionalFederalValuationAllowanceOnNetOperatingLossCarryforwardsAndOtherFederalTaxAssets
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax effect of additional state valuation allowance on net operating loss carryforwards. + References No definition available. + Details
Name: | crk_TaxEffectOfAdditionalStateValuationAllowanceOnNetOperatingLossCarryforwards
Namespace Prefix: | crk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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