Other Comprehensive Loss - Changes in Accumulated OCI by Component (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Change in cash flow hedges reclassed to earnings	$ (828)	$ (688)	$ (1,173)
Other Income (Expense), Net [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Change in cash flow hedges reclassed to earnings			600
Interest Expense [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Change in cash flow hedges reclassed to earnings	$ 800	800	700
Equity in Net Income of Joint Ventures [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Change in cash flow hedges reclassed to earnings		$ 100	$ 100