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Amended and Restated Credit Agreement (Details) (Revolving Credit Facility [Member], USD $) |  | 0 Months Ended | 3 Months Ended |  |
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Mar. 31, 2014 Letter of Credit [Member] Fifth Third Bank [Member] | Jul. 09, 2013 Line of Credit [Member] London Interbank Offered Rate (LIBOR) [Member] United States of America, Dollars | Jul. 09, 2013 Line of Credit [Member] Canadian prime rate [Member] Canada, Dollars | Jul. 09, 2013 Line of Credit [Member] Prime Rate [Member] United States of America, Dollars | Jul. 09, 2013 Line of Credit [Member] Canadian Dealer Offered Rate (CDOR) [Member] Canada, Dollars | Mar. 31, 2014 Line of Credit [Member] Fifth Third Bank [Member] | Jul. 09, 2013 Line of Credit [Member] Fifth Third Bank [Member] | Nov. 07, 2012 Line of Credit [Member] Fifth Third Bank [Member]
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Maximum Borrowing Capacity |  |  |  |  |  |  | $ 400,000,000 | $ 175,000,000
Maximum Borrowing Capacity under Accordion Feature |  |  |  |  |  |  | 450,000,000 |
Debt Instrument, Description of Variable Rate Basis |  | LIBOR | Canadian dollar prime rate, | U.S. dollar prime rate | Canadian Dealer Offered Rate |  |  |
Weighted Average Interest Rate |  |  |  |  |  | 2.70% |  |
Unused Capacity, Commitment Fee Percentage |  |  |  |  |  | 0.40% |  |
Holdings Note Principal amount outstanding |  |  |  |  |  | 102,000,000 |  |
Borrowings outstanding | 0 |  |  |  |  | 260,500,000 |  |
Letters of Credit Outstanding | 13,500,000 |  |  |  |  |  |  |
Remaining Borrowing Capacity |  |  |  |  |  | $ 126,000,000 |  |

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- Definition Related Party Limiited Guaranty of Debt + References No definition available. + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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