COMMON AND PREFERRED STOCK (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) payment $ / shares shares	Mar. 31, 2019 USD ($) shares	Jan. 31, 2020 USD ($)	Dec. 31, 2019 $ / shares shares	Nov. 30, 2019 USD ($)	May 31, 2011 USD ($)
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	675,000,000			675,000,000
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001			$ 0.001
Common stock, shares issued (in shares)	405,803,181
Common stock, shares outstanding (in shares)	405,803,181			406,085,183
Preferred stock, shares authorized (in shares)	5,000,000			5,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.001			$ 0.001
Preferred stock, shares outstanding (in shares)	2,294,702			1,500,000
Common stock surrendered by certain employees to cover tax obligations (shares)	300,000
Fair value of common stock surrendered by certain employees to cover tax obligations | $	$ 400,000	$ 0
Shares issued upon conversion of debt (in shares)	794,702
Stock repurchase program, amount approved | $						$ 150,000,000.0
Stock repurchased (in shares)	0	5,600,000
Stock repurchased, value | $		$ 16,300,000
Repurchase of stock recorded as a settlement of contingent consideration liabilities | $		$ 1,200,000
Second Lien Notes due 2023
Class of Stock [Line Items]
Aggregate principal amount of debt repurchased and retired | $	$ 76,700,000		$ 76,700,000		$ 70,800,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	2,294,702
Preferred stock, shares outstanding (in shares)	2,294,702
Preferred stock, dividend rate	6.50%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares	$ 100
Amount of undeclared accumulated preferred stock dividends | $	$ 5,300,000
Shares issued upon conversion (in shares)	43.63
Conversion price (in dollars per share) | $ / shares	$ 2.292
Threshold of common stock price as a percent of conversion price triggering conversion	145.00%
Threshold trading days at which conversion occurs	20 days
Conversion trading days window	30 days
Number of annual dividend payments | payment	8