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Summarized Information of Location and Gross Amount of Derivatives' Fair Value in Consolidated Balance Sheets (Detail) - Not Designated as Hedging Instrument - Interest Rate Swap - Other Liabilities - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
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Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 200,000 | $ 200,000
Fair Value | $ (11,801) | $ (13,675)

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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 Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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