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Income Taxes - Additional Information (Details) (USD $) In Millions, unless otherwise specified				6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2010	Jun. 30, 2014 Beginning tax year	Jun. 30, 2014 Beginning tax year as result of federal NOL carryforwards	Jun. 30, 2014 Minimum	Jun. 30, 2014 Maximum
Income Taxes
Federal net operating loss carryforwards subject to the IRC Section 382 limitation			$ 923.0
Unrecognized tax benefits	0.1	1.4
Unrecognized tax benefits, accrued interest and penalties		0.1
Beginning tax year, years open for federal examination				2010	2005
Number of tax years open for state tax audit (in years)						3 years	5 years
Decrease in gross unrecognized tax benefits balance within next twelve months	$ 0

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Number of taxable years open for state tax audit

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

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-Publisher FASB

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6527854



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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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