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AOCI (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 2,645,000 $ 2,830,000
Other comprehensive income before reclassifications 30,000 48,000
Amounts reclassified from accumulated other comprehensive income, before tax (350,000) (306,000)
Other Comprehensive Income (Loss), Tax 89,000 73,000
Accumulated Other Comprehensive Income (Loss), Net of Tax 2,414,000 2,645,000
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated Other Comprehensive Income (Loss), Net of Tax 0 0
Other comprehensive income before reclassifications (289,000) 0
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion (14,000) 0
Other Comprehensive Income (Loss), Tax 103,000 0
Accumulated Other Comprehensive Income (Loss), Net of Tax (200,000) 0
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated Other Comprehensive Income (Loss), Net of Tax 2,645,000 2,830,000
Other comprehensive income before reclassifications 319,000 48,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax (336,000) (306,000)
Other Comprehensive Income (Loss), Tax (14,000) 73,000
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 2,614,000 $ 2,645,000