The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Intangible and Other Non-Current Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Other Assets, Noncurrent	$ 31		$ 31		$ 50
Deferred Costs and Other Assets	14,745		14,745		14,957
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Other Assets, Noncurrent	11,663		11,663		11,663
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	3,051		3,051		3,244
Finite-Lived Intangible Assets, Accumulated Amortization	5,773		5,773		$ 5,501
Amortization of Intangible Assets	$ 136	$ 99	$ 272	$ 202
Noncompete Agreements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life			1 year
Noncompete Agreements [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life			10 years