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Credit Agreement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Debt Disclosure [Abstract] |  |
Revolving credit facility | $ 70.0 |
Revolving credit facility maturity date | Jun. 30, 2016 | Jan. 31, 2014
Number of days for pre-payment notice | 3 days |
Number of days for termination notice | 5 days |
Minimum cash under covenant term | $ 200.0 |
Loans disbursed under Credit Agreement secured by cash, percentage | 100.00% |

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- Definition Credit Agreement Minimum Cash Balance Amount + References No definition available. + Details
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- Definition The percentage of cash collateralization for amounts borrowed under existing revolving credit facility. + References No definition available. + Details
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- Definition Prepayment Notice Period + References No definition available. + Details
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- Definition Termination Notice Period + References No definition available. + Details
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- Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 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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