Annual report pursuant to Section 13 and 15(d)

Leases (Details Textual)

v3.3.1.900
Leases (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Capital Leased Assets [Line Items]      
Lease rent expenses $ 7.8 $ 2.6 $ 1.9
Minimum      
Capital Leased Assets [Line Items]      
Capital lease interest rate 2.00%    
Maximum      
Capital Leased Assets [Line Items]      
Capital lease interest rate 7.00%