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Recent Accounting Pronouncements - Summary of Cumulative Effect of Adoption on Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Assets      
Inventories $ 168,782   $ 45,543
Prepaid expenses and other current assets 28,638   20,310
Property and equipment, net 530,687   656,038
Other non-currentassets 56,127   67,107
Liabilities      
Current deferred revenue 36,227   43,448
Other non-currentliabilities 87,546   134,655
Equity      
Accumulated deficit (1,092,623)   $ (1,089,369)
Accounting Standards Update 2014-09 And 340-40 [Member]      
Assets      
Inventories   $ 46,517  
Prepaid expenses and other current assets   20,913  
Property and equipment, net   653,072  
Other non-currentassets   37,101  
Liabilities      
Current deferred revenue   36,266  
Other non-currentliabilities   86,277  
Equity      
Accumulated deficit   $ (1,065,204)  
Accounting Standards Update 2014-09 And 340-40 [Member] | Difference between Guidance in Effect Before and after Topic 606 and ASC 34040 [Member]      
Assets      
Inventories 974    
Prepaid expenses and other current assets 603    
Property and equipment, net (2,966)    
Other non-currentassets (30,006)    
Liabilities      
Current deferred revenue (7,182)    
Other non-currentliabilities (48,378)    
Equity      
Accumulated deficit $ 24,165