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Asset Retirement Obligations
 6 Months Ended
Jun. 30, 2018
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations
ASSET RETIREMENT OBLIGATIONS
The components of the changes in the asset retirement obligation liabilities were:
(Dollars in thousands)
 
Short-Term
Portion
 
Long-Term
Portion
 
Total
Balance at January 1, 2018
 
$
235

 
$
7,174

 
$
7,409

Accretion
 
(45
)
 
315

 
270

Amounts paid
 
(83
)
 
—

 
(83
)
Increases
 
—

 
39

 
39

Reclassifications
 
177

 
(177
)
 
—

Balance at June 30, 2018
 
$
284

 
$
7,351

 
$
7,635

The balances above were included within other current liabilities and other non-current liabilities on the Condensed Consolidated Balance Sheet, respectively, at June 30, 2018.
Increases other than accretion, reclassification and amounts paid primarily relate to changes in estimate of the underlying liability, specifically as it relates to updates in estimated costs to remove a transmitter and the estimated timing of removal. The cost associated with the estimated removal costs and timing refinements due to ongoing network rationalization activities is expected to accrete to a total liability of $9.0 million. The total estimated liability is based on the transmitter locations remaining after we have consolidated the number of networks we operate and assume the underlying leases continue to be renewed to that future date.
Accretion expense was $0.3 million for the six months ended June 30, 2018 and 2017. Accretion expense related solely to asset retirement obligations and was recorded based on the interest method.