SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - New Accounting Standards - Effects of Adoption (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to stockholders' equity	$ 213,500	$ 218,936	$ 227,429		$ 436,670	$ 439,659	$ 447,099	$ 436,217	$ 457,100
Property, plant and equipment, net	173,049				191,951
Other noncurrent assets	11,522				4,426
Accounting Standards Update 2018-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, net				$ (4,900)
Other current assets				900
Other noncurrent assets				$ 4,000
Retained Earnings (Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to stockholders' equity	$ (174,689)	$ (165,616)	$ (152,088)		48,673	$ 55,824	$ 62,881	$ 56,455	81,450
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to stockholders' equity					(1,034)				(767)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings (Deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to stockholders' equity					$ (1,034)				$ (767)