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Leases - Additional Information (Detail)
$ in Thousands, ¥ in Millions, kr in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
SEK (kr)
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Mar. 31, 2018
JPY (¥)
Capital Leased Assets [Line Items]                  
Weighted average effective interest rate (percent) 7.88%     7.88%   7.88%      
Purchases of real estate           $ 182,418 $ 95,083 $ 28,118  
Repayment of capital lease and other financing obligations           103,774 93,470 114,385  
Loss on debt extinguishment           (51,377) (65,772) (12,276)  
Rent expense           185,400 $ 157,900 $ 140,600  
NY4, NY5, NY6 and NY7                  
Capital Leased Assets [Line Items]                  
Purchases of real estate $ 335,600                
NY4 and NY7 [Member]                  
Capital Leased Assets [Line Items]                  
Capital lease liability $ 23,700     $ 23,700   $ 23,700      
NY5 and NY6 [Member]                  
Capital Leased Assets [Line Items]                  
Loss on debt extinguishment       $ 6,500          
Stockholm 2 (SK2)                  
Capital Leased Assets [Line Items]                  
Purchases of real estate   $ 54,900 kr 457.9            
Repayment of capital lease and other financing obligations   28,100 234.5            
Loss on debt extinguishment   20,400 kr 170.5            
Tokyo 11 (TY11)                  
Capital Leased Assets [Line Items]                  
Capital lease liability   $ 22,100     $ 22,100       ¥ 2,348.5
Lease, term of contract         30 years        
Minimum                  
Capital Leased Assets [Line Items]                  
Capital lease expiration period           2019      
Maximum                  
Capital Leased Assets [Line Items]                  
Capital lease expiration period           2053