Annual report pursuant to Section 13 and 15(d)

Fair Value Fair Value Nonrecurring Measurements (Details)

v3.6.0.2
Fair Value Fair Value Nonrecurring Measurements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value Measurements, Nonrecurring Basis        
Goodwill $ 62,885 $ 62,885 $ 101,913 $ 105,943
Loss on impairment of goodwill $ 0 (39,028) $ 0  
Fair Value, Measurements, Nonrecurring        
Fair Value Measurements, Nonrecurring Basis        
Goodwill, Fair Value Disclosure [1]   62,885    
Fair Value, Measurements, Nonrecurring | Level 1        
Fair Value Measurements, Nonrecurring Basis        
Goodwill, Fair Value Disclosure [1]   0    
Fair Value, Measurements, Nonrecurring | Level 2        
Fair Value Measurements, Nonrecurring Basis        
Goodwill, Fair Value Disclosure [1]   0    
Fair Value, Measurements, Nonrecurring | Level 3        
Fair Value Measurements, Nonrecurring Basis        
Goodwill, Fair Value Disclosure [1]   $ 62,885    
[1] Goodwill with a carrying amount of $101,913 as of December 31, 2014 was written down to its implied fair value of $62,885, resulting in an impairment charge of $39,028, which has been included in earnings for the year ended December 31, 2015.