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Income Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2010
Income Taxes
Federal net operating loss carryforwards subject to the IRC Section 382 limitation			$ 929.4us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
Unrecognized tax benefits	0.1us-gaap_UnrecognizedTaxBenefits	$ 0.1us-gaap_UnrecognizedTaxBenefits
Minimum
Income Taxes
Number of tax years open for state tax audit (in years)	3 years
Maximum
Income Taxes
Number of tax years open for state tax audit (in years)	5 years
Domestic Tax Authority | Earliest Tax Year
Income Taxes
Open tax year	2011
Net Operating Loss And Other Carryforwards | Earliest Tax Year
Income Taxes
Open tax year	2005
Net Operating Loss And Other Carryforwards | Latest Tax Year
Income Taxes
Open tax year	2010

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

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