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Share-Based Compensation	3 Months Ended
	Mar. 31, 2018
Share-Based Compensation [Abstract]
Share-Based Compensation	 (7) Share-Based Compensation Compensation expense for share-based compensation arrangements, which is recognized in the condensed consolidated statements of operations as a component of SG&A expenses, was $1,404 and $2,339 for the three months ended March 31, 2018 and 2017, respectively.  The three months ended March 31, 2018 included expenses related to higher attainment of performance based awards which was offset by the forfeiture of certain grants associated with employee resignations. The three months ended March 31, 2017 included expenses related to higher attainment of performance based awards and accelerated expense associated with the retirement of eligible employees. 

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- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2208855

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- References

No definition available.

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