NET INCOME (LOSS) PER COMMON SHARE - Antidilutive Securities (Details) - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	331	755	0
Price range of option: from (in dollars per share)	$ 9.66
Price range of option: to (in dollars per share)	$ 13.98
Share-based Payment Arrangement, Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	543	564	548
Price range of option: from (in dollars per share)	$ 9.66	$ 6.43	$ 11.69
Price range of option: to (in dollars per share)	$ 13.98	$ 13.98	$ 13.98
Restricted Stock Units (RSUs) \| Restricted Stock Units Service Conditions
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	2,953	1,394	163
Restricted Stock Units (RSUs) \| Restricted Stock Units Service And Market Conditions But Market Not Met
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	70	226	336
Restricted Stock Units (RSUs) \| Restricted Stock Units Service And Performance Conditions But Performance Not Met
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	0	0	0
Restricted Stock Units (RSUs) \| Perpetual Cumulative Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded shares as anti-dilutive when reporting a net loss	0	0	0

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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