Annual report pursuant to Section 13 and 15(d)

Concentration Risk (Detail Textuals)

v3.8.0.1
Concentration Risk (Detail Textuals) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Risks and Uncertainties [Abstract]      
Expenses incurred on hotel and restaurant services $ 152.3 $ 137.2 $ 122.4