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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Related Party Transaction [Line Items] |  |
Purchase of non-controlling interests | $ 409 | $ 274
Treasury stock, shares | 1,531,713 | 1,502,993
Partnership And Trust [Member] |  |
Related Party Transaction [Line Items] |  |
Purchase of non-controlling interests | $ 409 | $ 274
Related Party [Member] |  |
Related Party Transaction [Line Items] |  |
Treasury stock, shares | 0 | 0

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- Definition The cash outflow during the period for redemption of redeemable noncontrolling interests. + References No definition available. + 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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- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. + 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 210.5-02.28,29) -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 29, 30 -Article 5 + Details
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- Details
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