Stock Compensation - Schedule of Restricted, Phantom, and Board of Director Awards (Details) - $ / shares	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Restricted stock units (RSU)
Number of Awards
Non-vested, beginning (in shares)	296,983	596,491
Granted (in shares)	513,851	194,570
Vested (in shares)	(63,744)	(354,637)
Forfeited or expired (in shares)	(302,283)	(139,441)
Non-vested, ending (in shares)	444,807	296,983
Weighted-Average Grant Date Fair Value
Non-vested, beginning (in dollars per share)	$ 5.66	$ 6.34
Granted (in dollars per share)	4.32	5.32
Vested (in dollars per share)	5.46	6.34
Forfeited or expired (in dollars per share)	6.26	6.35
Non-vested, ending (in dollars per share)	$ 5.35	$ 5.66
Phantom stock options
Number of Awards
Non-vested, beginning (in shares)	109,809	154,502
Granted (in shares)	90,000	10,500
Vested (in shares)	0	(49,655)
Forfeited or expired (in shares)	(121,009)	(5,538)
Non-vested, ending (in shares)	78,800	109,809
Weighted-Average Grant Date Fair Value
Non-vested, beginning (in dollars per share)	$ 6.32	$ 6.34
Granted (in dollars per share)	4.35	6.11
Vested (in dollars per share)	0.00	6.34
Forfeited or expired (in dollars per share)	6.34	6.34
Non-vested, ending (in dollars per share)	$ 5.91	$ 6.32
Director \| Restricted stock
Number of Awards
Non-vested, beginning (in shares)	14,524	26,387
Granted (in shares)	96,853	69,539
Vested (in shares)	(104,115)	(76,802)
Forfeited or expired (in shares)		(4,600)
Non-vested, ending (in shares)	7,262	14,524
Weighted-Average Grant Date Fair Value
Non-vested, beginning (in dollars per share)	$ 6.22	$ 6.34
Granted (in dollars per share)	5.42	5.08
Vested (in dollars per share)	5.40	5.22
Forfeited or expired (in dollars per share)		6.34
Non-vested, ending (in dollars per share)	$ 5.48	$ 6.22

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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