Quarterly report pursuant to Section 13 or 15(d)

Changes in Accumulated Other Comprehensive Loss by Component - Reclassifications (Details)

v3.5.0.2
Changes in Accumulated Other Comprehensive Loss by Component - Reclassifications (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Amounts reclassified from accumulated other comprehensive loss:        
Interest expense, net $ 4,518 $ 2,824 $ 10,253 $ 8,057
Tax expense (benefit) 4,571 8,124 17,122 16,194
Reclassification net of tax $ (7,201) $ (15,334) (28,518) (28,630)
Other Postretirement Benefit Liability | Amount reclassified from accumulated other comprehensive income        
Amounts reclassified from accumulated other comprehensive loss:        
Actuarial (gains) losses     (95) (51)
Tax expense (benefit)     36 19
Reclassification net of tax     (59) (32)
Pension Liability | Amount reclassified from accumulated other comprehensive income        
Amounts reclassified from accumulated other comprehensive loss:        
Actuarial (gains) losses     543 765
Tax expense (benefit)     (206) (291)
Reclassification net of tax     337 $ 474
Unrealized Net Loss on Interest Rate Swap | Interest rate swap        
Amounts reclassified from accumulated other comprehensive loss:        
Interest expense, net     292  
Tax expense (benefit)     (111)  
Reclassification net of tax     $ 181