Annual report pursuant to Section 13 and 15(d)

Summary of Activity for Each of Company's Other Investments (Parenthetical) (Detail)

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Summary of Activity for Each of Company's Other Investments (Parenthetical) (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Equity Method Investments And Joint Ventures [Abstract]  
Proceeds from sale of investment in joint venture $ 2,634
Loss on sale of assets and other $ 1,251