Annual report pursuant to Section 13 and 15(d)

Geographic Information (Details)

v3.6.0.2
Geographic Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Long-lived assets $ 249,637               $ 324,776 $ 249,637  
Revenues 174,225 $ 180,598 $ 162,628 $ 133,776 $ 173,768 $ 189,142 $ 152,489 $ 115,433 651,227 630,832 $ 593,241
United States                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Long-lived assets 235,298               306,908 235,298  
Revenues                 588,791 567,815 509,200
Canada                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Long-lived assets 14,233               16,454 14,233  
Revenues                 49,706 48,968 70,069
Other Countries                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Long-lived assets $ 106               1,414 106  
Revenues                 $ 12,730 $ 14,049 $ 13,972