XML 69 R55.htm IDEA: XBRL DOCUMENT v3.6.0.2
Retirement Plans, Amounts Recognized in Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Noncurrent asset $ 0 $ 0
Current liability 0 0
Long-term liability (79,659) (53,737)
SERP [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Noncurrent asset 0 0
Current liability (150) (149)
Long-term liability (1,307) (1,377)
Other Postretirement Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Noncurrent asset 0 0
Current liability (56) (68)
Long-term liability $ (619) $ (823)