Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Changes in Accumulated Other Comprehensive Loss by Component - Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period $ (6,672) $ (6,183)
Other comprehensive earning (loss) before reclassifications (189) (1,227)
Amounts reclassified from accumulated other comprehensive loss 155 153
Balance at the end of the period (6,706) (7,257)
Unrealized Net Loss on Interest Rate Swap    
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period (1,195) (937)
Other comprehensive earning (loss) before reclassifications (189) (1,227)
Amounts reclassified from accumulated other comprehensive loss 60 60
Balance at the end of the period (1,324) (2,104)
Other Postretirement Benefit Liability    
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period 937 1,048
Amounts reclassified from accumulated other comprehensive loss (17) (20)
Balance at the end of the period 920 1,028
Pension Liability    
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period (6,414) (6,294)
Amounts reclassified from accumulated other comprehensive loss 112 113
Balance at the end of the period $ (6,302) $ (6,181)