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SHARE-BASED COMPENSATION (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentages of vesting for one year	100.00%
Percentages of vesting for three years	33.30%
Percentages of vesting for five years	20.00%
Percentages of vesting for ten years	10.00%
Award vesting period	1 year
Number of shares available for future grants (in shares)	419,597
Restricted Stock [Roll Forward]
Non-vested, beginning balance (in shares)	137,507	179,942	211,510
Granted (in shares)	108,553	35,821	52,219
Forfeited (in shares)	(39,000)	(20,855)	(14,112)
Vested (in shares)	(63,680)	(57,401)	(69,675)
Nonvested, ending balance (in shares)	143,380	137,507	179,942
Weighted Average Grant Price [Roll Forward]
Non vested, beginning balance (in dollars per share)	$ 54.58	$ 52.71	$ 36.17
Granted (in dollars per share)	17.07	40.95	93.12
Forfeitures (in dollars per share)	65.41	41.34	38.68
Vested (in dollars per share)	46.65	44.99	35.41
Nonvested, ending balance (in dollars per share)	$ 26.76	$ 54.58	$ 52.71
Stock compensation expense	$ 2.0	$ 3.0	$ 3.6
Related income tax benefit recognized	0.6	1.2	$ 1.4
Unrecognized compensation expense	$ 2.7	$ 4.9
Compensation cost not yet recognized, period for recognition	15 months 6 days

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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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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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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

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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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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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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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