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Long-Term Debt (Details) (Line of Credit [Member], Wells Fargo Credit Agreement [Member], USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2012
Line of Credit Facility [Line Items] |
Line of Credit Facility, Maximum Borrowing Capacity | 125
Line of Credit Facility, Amount Outstanding | 52.5
Line of Credit Facility, Remaining Borrowing Capacity | 72.5
Fixed 30 Day Interest Rate 1 [Member] |
Line of Credit Facility [Line Items] |
Line of Credit Facility, Amount Outstanding | 50.5
Debt Instrument, Interest Rate, Stated Percentage | 1.50%
Swingline Variable Interest Rate [Member] |
Line of Credit Facility [Line Items] |
Line of Credit Facility, Amount Outstanding | 2.0
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.72%
Borrower's Option 1 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | base rate
Debt Instrument, Basis Spread on Variable Rate | 0.25%
Borrower's Option 2 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | London Inter-Bank Offered Rate (“LIBOR”) Market Index Rate
Debt Instrument, Basis Spread on Variable Rate | 1.25%
Borrower's Option 3 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | LIBOR Rate
Debt Instrument, Basis Spread on Variable Rate | 1.25%
Default Option [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | LIBOR Market Index Rate
Debt Instrument, Basis Spread on Variable Rate | 1.25%
Base Rate Option 1 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | prime rate (as announced by Wells Fargo)
Base Rate Option 2 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | federal funds rate
Debt Instrument, Basis Spread on Variable Rate | 0.50%
Base Rate Option 3 [Member] |
Line of Credit Facility [Line Items] |
Debt Instrument, Description of Variable Rate Basis | LIBOR for an interest period of one month
Debt Instrument, Basis Spread on Variable Rate | 1.00%

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- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument. + 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 Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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 Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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 Reference 3: 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 + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 Reference 2: 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 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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