STOCK-BASED COMPENSATION - SAR Activity (Details) (Stock Appreciation Rights (SARs), USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity Incentive Plans
Vesting period	3 years
Exercise period	10 years
Compensation expense	$ 0	$ 0	$ 1.1
Stock Appreciation Rights
Beginning balance (in shares)	330,000
Granted (in shares)	0
Exercised (in shares)	0
Canceled (in shares)	(10,000)
Ending balance (in shares)	320,000	330,000
Weighted Average Exercise Price
Beginning balance (dollars per share)	$ 6.73
Granted (dollars per share)	$ 0.00
Exercised (dollars per share)	$ 0.00
Canceled (dollars per share)	$ 9.16
Ending balance (dollars per share)	$ 6.65	$ 6.73
Weighted Average Remaining Recognition Period
Weighted average remaining recognition period	3 months 19 days	1 year 8 months 1 day
Unrecognized compensation expense	0.1
Weighted-average period for unrecognized compensation expense	3 months 10 days
Payments of Stock Issuance Costs	$ 0us-gaap_PaymentsOfStockIssuanceCosts	$ 0us-gaap_PaymentsOfStockIssuanceCosts	$ 0.3us-gaap_PaymentsOfStockIssuanceCosts
Minimum
Equity Incentive Plans
Holding period	1 year

Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Holding Period

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

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-Glossary Financing Activities

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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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.

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- Definition

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).

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- Definition

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).

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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.

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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.

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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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.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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