Income Taxes	6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes. The Company makes certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments are applied in the calculation of tax credits, tax benefits and deductions, and in the calculation of certain deferred tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes. Deferred tax assets and deferred tax liabilities are adjusted to the extent necessary to reflect tax rates expected to be in effect when the temporary differences reverse. Adjustments may be required to deferred tax assets and deferred tax liabilities due to changes in tax laws and audit adjustments by tax authorities. To the extent adjustments are required in any given period, the adjustments would be included within the tax provision in the condensed consolidated statements of income or balance sheet. On September 13, 2013, the U.S. Treasury Department released final income tax regulations on the deduction and capitalization of expenditures related to tangible property. These final regulations apply to tax years beginning on or after January 1, 2014. Application of these provisions will require the Company to file a tax accounting method change with the IRS and record a cumulative adjustment with its 2014 tax return. The Company is subject to taxation by the United States and various state and local jurisdictions. As of June 30, 2015, the Company’s tax years 2012 (short-year return) and 2013, which were prepared on a standalone basis excluding Matson, are open to examination by the federal and state tax authorities. For tax years in which the Company was included in the consolidated tax group together with Matson, the 2011 and 2012 tax years remain open to examination by the federal and state tax authorities, and in addition the 2010 tax year remains open to examination by California. The Company's 2012 short-year tax return is currently under examination by the IRS.

Income Taxes

6 Months Ended

Jun. 30, 2015

Income Taxes. The Company makes certain estimates and judgments in determining income tax expense for financial statement purposes. These estimates and judgments are applied in the calculation of tax credits, tax benefits and deductions, and in the calculation of certain deferred tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes. Deferred tax assets and deferred tax liabilities are adjusted to the extent necessary to reflect tax rates expected to be in effect when the temporary differences reverse. Adjustments may be required to deferred tax assets and deferred tax liabilities due to changes in tax laws and audit adjustments by tax authorities. To the extent adjustments are required in any given period, the adjustments would be included within the tax provision in the condensed consolidated statements of income or balance sheet.

On September 13, 2013, the U.S. Treasury Department released final income tax regulations on the deduction and capitalization of expenditures related to tangible property. These final regulations apply to tax years beginning on or after January 1, 2014. Application of these provisions will require the Company to file a tax accounting method change with the IRS and record a cumulative adjustment with its 2014 tax return.

The Company is subject to taxation by the United States and various state and local jurisdictions. As of June 30, 2015, the Company’s tax years 2012 (short-year return) and 2013, which were prepared on a standalone basis excluding Matson, are open to examination by the federal and state tax authorities. For tax years in which the Company was included in the consolidated tax group together with Matson, the 2011 and 2012 tax years remain open to examination by the federal and state tax authorities, and in addition the 2010 tax year remains open to examination by California. The Company's 2012 short-year tax return is currently under examination by the IRS.