CAPITAL STOCK, Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		1,089,131
Stock Option Activity [Roll Forward]
Cash received from the exercise of stock options		$ 5,600	$ 5,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	100.00%
Employee Stock Option [Member]
Stock Option Activity [Roll Forward]
Options outstanding at beginning of period (in shares)		4,345,334
Granted (in shares)		0
Exercised (in shares)		(787,867)
Forfeited or canceled (in shares)		(709,965)
Options outstanding at end of period (in shares)		2,847,502	4,345,334
Options vested at end of period or expected to vest (in shares)		2,847,502
Options exercisable at end of period (in shares)		2,707,454
Weighted-average exercise price, options outstanding at beginning of period (in dollars per share)		$ 10.68
Weighted-average exercise price, options granted (in dollars per share)		0.00
Weighted-average exercise price, options exercised (in dollars per share)		7.67
Weighted-average exercise price, options forfeited or canceled (in dollars per share)		15.06
Weighted-average exercise price, options outstanding at end of period (in dollars per share)		10.43	$ 10.68
Weighted-average exercise price, options vested at December 31, 2016 or expected to vest (in dollars per share)		10.43
Weighted-average exercise price, options exercisable at December 31, 2016 (in dollars per share)		$ 10.57
Weighted-average remaining contractual term of options outstanding (in years)		2 years 310 days
Weighted-average remaining contractual term of options vested or expected to vest (in years)		2 years 310 days
Weighted-average remaining contractual term of options exercisable (in years)		2 years 285 days
Aggregate intrinsic value options outstanding		$ 0
Aggregate intrinsic value options vested or expected to vest		0
Aggregate intrinsic value options exercisable		$ 0
Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		7 years
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Non-employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield (in hundredths)			0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			1.07%	1.24%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			52.00%	50.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term			4 years 175 days	4 years 58 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 3.91	$ 3.03