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Interest Rate Swap Contracts (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Interest Rate Swap 1 [Member] |
Derivative [Line Items] |
Contract Term | Jun. 30, 2014
Notional Value | $ 8,000
Hedged Instruments | US Term Note
Fixed Rate | 1.27%
Variable Rate | 3 month LIBOR
Interest Rate Swap 2 [Member] |
Derivative [Line Items] |
Contract Term | Jun. 30, 2014
Notional Value | 8,000
Hedged Instruments | US Term Note
Fixed Rate | 1.27%
Variable Rate | 3 month LIBOR
Interest Rate Cap [Member] |
Derivative [Line Items] |
Contract Term | Mar. 31, 2016
Notional Value | $ 14,250
Hedged Instruments | W.E.T. Term Note
Variable Rate | 3 month EURIBOR
Rate Cap | 2.75%

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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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Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Description of the hedged item related to the derivative. Includes the type of instrument hedged, contract amount, term, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959 + Details
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- Definition The reference rate for the variable rate of the interest rate derivative, 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 Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition High end of the range of variable interest rates when a range is presented for a group of interest rate derivatives. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Period Type: | duration

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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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