Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s income tax provision of $6.9 million and $79.4 million for the three months ended September 30, 2015 and 2014, respectively, included a tax benefit of $0.8 million and $1.2 million related to the remeasurement of foreign income tax accounts for the same respective periods. The Company’s income tax benefit of $83.2 million and provision of $30.9 million for the nine months ended September 30, 2015 and 2014, respectively, included tax benefits of $1.0 million and $3.9 million related to the remeasurement of foreign income tax accounts, respectively. The Company's effective tax rate before remeasurement for the three and nine months ended September 30, 2015 is based on the Company’s estimated full year effective tax rate, comprised of expected statutory tax expense more than offset by reductions from percentage depletion, foreign rate differential and changes in valuation allowance. The Company wrote-off deferred tax assets due to the repeal of the Australian Minerals Rent Resource Tax (MRRT) of $70.1 million and $16.1 million for the three and nine months ended September 30, 2014, respectively. The income tax expense and tax benefit recorded for the three and nine months ended September 30, 2015 are primarily comprised of a tax allocation to results from continuing operations related to the tax effects of items credited directly to "Other comprehensive income". Generally, the amount of tax provision or benefit allocated to continuing operations is determined without regard to the tax effects of other categories of income or loss, such as "Other comprehensive income." However, an exception applies in periods in which there is a year-to-date loss from continuing operations before taxes and income in other categories of earnings before taxes. Under this exception, and notwithstanding the continuing valuation allowance on the Company's net deferred tax assets in the U.S. and Australia, the tax provision is first allocated to the other categories of earnings and a related tax benefit is recorded in results from continuing operations. There was no similar activity recorded for the three or nine months ended September 30, 2014. During the three and nine months ended September 30, 2015, the Company decreased its unrecognized tax benefits, including interest and penalties related thereto, by $25.0 million due to finalization of IRS audits on the 2009 through 2013 tax years.

Income Taxes

The Company’s income tax provision of $6.9 million and $79.4 million for the three months ended September 30, 2015 and 2014, respectively, included a tax benefit of $0.8 million and $1.2 million related to the remeasurement of foreign income tax accounts for the same respective periods. The Company’s income tax benefit of $83.2 million and provision of $30.9 million for the nine months ended September 30, 2015 and 2014, respectively, included tax benefits of $1.0 million and $3.9 million related to the remeasurement of foreign income tax accounts, respectively. The Company's effective tax rate before remeasurement for the three and nine months ended September 30, 2015 is based on the Company’s estimated full year effective tax rate, comprised of expected statutory tax expense more than offset by reductions from percentage depletion, foreign rate differential and changes in valuation allowance. The Company wrote-off deferred tax assets due to the repeal of the Australian Minerals Rent Resource Tax (MRRT) of $70.1 million and $16.1 million for the three and nine months ended September 30, 2014, respectively.

The income tax expense and tax benefit recorded for the three and nine months ended September 30, 2015 are primarily comprised of a tax allocation to results from continuing operations related to the tax effects of items credited directly to "Other comprehensive income". Generally, the amount of tax provision or benefit allocated to continuing operations is determined without regard to the tax effects of other categories of income or loss, such as "Other comprehensive income." However, an exception applies in periods in which there is a year-to-date loss from continuing operations before taxes and income in other categories of earnings before taxes. Under this exception, and notwithstanding the continuing valuation allowance on the Company's net deferred tax assets in the U.S. and Australia, the tax provision is first allocated to the other categories of earnings and a related tax benefit is recorded in results from continuing operations. There was no similar activity recorded for the three or nine months ended September 30, 2014.

During the three and nine months ended September 30, 2015, the Company decreased its unrecognized tax benefits, including interest and penalties related thereto, by $25.0 million due to finalization of IRS audits on the 2009 through 2013 tax years.