STOCK-BASED COMPENSATION (Details)
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12 Months Ended |
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Dec. 05, 2016
shares
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Dec. 11, 2015
shares
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Dec. 28, 2014
shares
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May 14, 2014
shares
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Mar. 04, 2014
member_of_board_of_directors
shares
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Dec. 31, 2016
USD ($)
member_of_board_of_directors
$ / shares
shares
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Dec. 31, 2015
USD ($)
$ / shares
shares
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Dec. 31, 2014
USD ($)
$ / shares
shares
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted average fair value of options granted | $ / shares |
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$ 2.62
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$ 4.91
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| Weighted average assumptions used: |
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| Expected volatility (in hundredths) |
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34.00%
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34.00%
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| Expected term (in years) |
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7 years
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7 years
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| Risk-free interest rate (in hundredths) |
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1.82%
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0.63%
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| Expected dividend yield (in hundredths) |
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0.00%
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0.00%
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |
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| Weighted average remaining contractual term |
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4 years 4 months 5 days
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5 years 2 months 20 days
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5 years 6 months
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ |
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$ 600,000
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$ 900,000
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| Vested options (in shares) |
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2,324,059
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2,221,818
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| Vesting percentage (in hundredths) |
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100.00%
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100.00%
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| Total unrecognized compensation expense | $ |
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$ 500,000
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$ 1,200,000
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| Weighted average recognition period of unrecognized compensation expense |
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1 year 1 month 2 days
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1 year 9 months 18 days
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| Compensation expense | $ |
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$ 800,000
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$ 1,700,000
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$ 2,000,000
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| Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | $ / shares |
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$ 13.96
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$ 13.75
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$ 13.38
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |
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(116,594)
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(225,960)
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| Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ / shares |
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$ 9.35
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$ 9.75
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| Weighted average fair value of options granted | $ / shares |
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$ 0.00
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$ 12.49
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
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| Stock options outstanding at beginning of period (in shares) |
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2,613,793
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2,749,064
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| Granted |
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0
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287,808
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| Forfeited or expired (in shares) |
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(1,666)
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(197,119)
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| Stock options outstanding at end of period (in shares) |
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2,495,533
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2,613,793
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2,749,064
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |
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| Weighted average exercise price at beginning of period (in dollars per share) | $ / shares |
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$ 13.75
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | $ |
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$ 5,729,000
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$ 617,000
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$ 3,373,000
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| Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price | $ / shares |
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$ 12.35
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$ 12.35
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| Restricted Stock [Member] | December Award [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Members of the Board of Directors Receiving Award | member_of_board_of_directors |
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3
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4
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| Board of Directors [Member] | Restricted Stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |
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5,240
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3,523
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] |
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| Compensation expense | $ |
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$ 300,000
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$ 300,000
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$ 300,000
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| Share-based Compensation Arrangement by Share-based Payment Award, Subsequent Time Period Over Which Award Will be Expensed |
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8 months
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10 months
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| Board of Directors [Member] | Restricted Stock [Member] | December Award [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |
19,420
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25,664
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23,944
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| Minimum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options vesting period |
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3 years
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| Maximum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options vesting period |
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5 years
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