XML 132 R118.htm IDEA: XBRL DOCUMENT v3.8.0.1
Prepaid Land Lease Payments - Additional Information (Detail)
12 Months Ended
Dec. 31, 2017
Bottom of range [Member]  
Disclosure Of Finance Lease And Operating Lease By Lessee [Line Items]  
Long-term operating lease duration P33Y
Top of range [Member]  
Disclosure Of Finance Lease And Operating Lease By Lessee [Line Items]  
Long-term operating lease duration P50Y