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Income Tax Disclosure Components of Income Tax (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
Current Federal Tax Expense (Benefit) | $ (935)us-gaap_CurrentFederalTaxExpenseBenefit | $ 2,444us-gaap_CurrentFederalTaxExpenseBenefit | $ 2,015us-gaap_CurrentFederalTaxExpenseBenefit
Current State and Foreign | 790pro_CurrentStateAndForeign | 160pro_CurrentStateAndForeign | 74pro_CurrentStateAndForeign
Current Income Tax Expense (Benefit) | (145)us-gaap_CurrentIncomeTaxExpenseBenefit | 2,604us-gaap_CurrentIncomeTaxExpenseBenefit | 2,089us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Federal Income Tax Expense (Benefit) | 12,334us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (2,651)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 1,030us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Deferred State and Local Income Tax Expense (Benefit) | 304us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (126)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (68)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Income Tax Expense (Benefit) | $ 12,493us-gaap_IncomeTaxExpenseBenefit | $ (173)us-gaap_IncomeTaxExpenseBenefit | $ 3,051us-gaap_IncomeTaxExpenseBenefit

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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 + Details
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