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Derivatives - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |  | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2014 Group I Swaps | Jan. 29, 2014 Group I Swaps | Sep. 30, 2014 Group II Swaps | Aug. 01, 2014 Group II Swaps
Derivative [Line Items] |  |  |  |
Swaps, number of instruments held |  | 4 |  | 3
Swaps, notional amount |  | $ 200,000 |  | $ 220,000
Swaps, description of variable rate basis | 1-month LIBOR |  | 3-month LIBOR |
Swaps, average fixed interest rate |  | 2.29% |  | 2.5795%

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + 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 Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
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Data Type: | num:percentItemType
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- Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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