XML 125 R112.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Loss Contingencies [Line Items]    
Self insurance accrued in health care claims $ 6,400,000  
Contingent liability
Construction Loan Payable    
Loss Contingencies [Line Items]    
Total remaining draws on construction loans committed to fund 437,000,000 244,000,000
Indemnification [Member]    
Loss Contingencies [Line Items]    
Contingent liability 0  
Guarantees [Member]    
Loss Contingencies [Line Items]    
Guarantee liability 1,100,000 $ 1,000,000
Contingent liability $ 0