Quarterly report pursuant to Section 13 or 15(d)

Non-Controlling Interests (Details)

v3.8.0.1
Non-Controlling Interests (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2015
Dec. 31, 2016
Noncontrolling Interest [Abstract]      
Term of extension of Call Option 6 months 6 months  
Term of extension of Put Option 1 year 1 year  
Variable Interest Entity [Line Items]      
Redeemable non-controlling interests $ 7,532   $ 6,847
Minimum      
Variable Interest Entity [Line Items]      
Exercise price of put options 659    
Maximum      
Variable Interest Entity [Line Items]      
Exercise price of put options $ 917