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Accumulated Other Comprehensive Loss
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Accumulated Other Comprehensive Loss
ACCUMULATED OTHER COMPREHENSIVE LOSS

Changes in accumulated other comprehensive loss ("AOCL") by component, including items reclassified out of AOCL, were as follows:
 
 
Defined Benefit Plans
 
Other
 
Total
Balance at December 31, 2013
 
$
(13,257
)
 
$
62

 
$
(13,195
)
Unrecognized actuarial loss, net of tax of $0
 
(13,704
)
 
 
 
(13,704
)
Amortization of unrecognized loss included in net periodic pension cost, net of tax of $0
 
230

 
(240
)
 
(10
)
Net current-period other comprehensive income (loss)
 
(13,474
)
 
(240
)
 
(13,714
)
Transfer of Knoxville and Memphis pension plans, net of tax of $(370)
 
24,127

 
—

 
24,127

Balance at December 31, 2014
 
(2,604
)
 
(178
)
 
(2,782
)
Immaterial prior period change in defined benefit
pension plan for an unconsolidated company, net
of tax of $451
 
 
 
(691
)
 
(691
)
Transfer unrecognized loss for defined benefit pension plan for an unconsolidated company to other
 
961

 
(961
)
 
—

Unrecognized actuarial gain, net of tax of $404
 
687

 
—

 
687

Prior service credit arising during 2015, net of tax of $137
 
233

 
—

 
233

Amortization of unrecognized gain included in net periodic pension cost, net of tax of $20
 
(34
)
 
—

 
(34
)
Net current-period other comprehensive income (loss)
 
1,847

 
(1,652
)
 
195

Balance at December 31, 2015
 
$
(757
)
 
$
(1,830
)
 
$
(2,587
)