Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information - Narrative (Details)

v3.7.0.1
Business Segment Information - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Unallocated corporate activity        
Segment Reporting Information [Line Items]        
Asset reserves $ 7,206 $ 6,839 $ 14,092 $ 14,566
Canada        
Segment Reporting Information [Line Items]        
Asset reserves   1,934    
Canada | Unallocated corporate activity        
Segment Reporting Information [Line Items]        
Asset reserves $ 0 $ 0 $ 0 0
Customer Who Declared Bankruptcy        
Segment Reporting Information [Line Items]        
Asset reserves       $ 1,001