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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, 2016
Dec. 31, 2015
Dec. 31, 2014
Interest Costs Incurred Capitalized [Abstract]      
Interest capitalized, beginning of year $ 4,434 $ 4,072 $ 3,294
Interest incurred 25,951 25,155 24,994
Interest expense (21,707) (23,559) (23,140)
Interest charged to cost of sales (3,572) (1,234) (1,076)
Interest capitalized, end of year $ 5,106 $ 4,434 $ 4,072