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Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Interest Costs Incurred Capitalized [Abstract]      
Interest capitalized, beginning of year $ 4,072 $ 3,294 $ 893
Interest incurred 25,155 24,994 25,048
Interest expense (23,559) (23,140) (22,385)
Interest charged to cost of sales (1,234) (1,076) (262)
Interest capitalized, end of year $ 4,434 $ 4,072 $ 3,294