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Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Interest Costs Incurred Capitalized [Abstract]    
Interest capitalized, beginning of period $ 5,106 $ 4,434
Interest incurred 6,559 6,388
Interest expense (5,836) (5,088)
Interest charged to cost of sales (265) (376)
Interest capitalized, end of period $ 5,564 $ 5,358