Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component (Parenthetical) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Gain on sale and change in control of interests			$ 19,700,000
Amortization of interest-rate contracts	118,000	118,000	354,000	354,000
Foreign Currency [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Gain on sale and change in control of interests	1,700,000		1,700,000
Interest Expense [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amortization of interest-rate contracts			400,000
Equity in Net Income of Joint Ventures [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Amortization of interest-rate contracts			$ 100,000