XML 75 R61.htm IDEA: XBRL DOCUMENT v3.3.1.900
Restructuring and asset impairment charges (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]    
Restructuring Reserve, Current $ 0 $ 764
Restructuring Costs 0  
Payments for Restructuring $ (764)  
Document Period End Date Dec. 31, 2015