Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Sep. 23, 2017	Sep. 24, 2016
Income Statement [Abstract]
Net Sales	$ 209,717	$ 206,540	$ 612,358	$ 637,858
Cost of Sales	(178,549)	(155,997)	(511,428)	(498,272)
Gross Margin	31,168	50,543	100,930	139,586
Selling, general and administrative expenses	(12,640)	(9,606)	(40,632)	(26,240)
Other operating (income) expense, net (Note 8)	(871)	500	(3,322)	(1,420)
Operating Income	17,657	41,437	56,976	111,926
Interest expense	(9,337)	(8,727)	(27,374)	(25,665)
Interest income and other, net	987	180	2,122	296
Unrealized gain on derivative instrument	14,087	0	16,149	0
Gain on debt extinguishment	0	0	0	8,844
Income Before Income Taxes	23,394	32,890	47,873	95,401
Income tax expense (Note 9)	(7,722)	(11,323)	(17,986)	(33,601)
Net Income Attributable to Rayonier Advanced Materials Inc.	15,672	21,567	29,887	61,800
Mandatory convertible stock dividends	(3,441)	(1,706)	(10,057)	(1,706)
Net Income Available to Rayonier Advanced Materials Inc. Common Stockholders	$ 12,231	$ 19,861	$ 19,830	$ 60,094
Earnings Per Share of Common Stock (Note 7)
Basic earnings per share (in dollars per share)	$ 0.29	$ 0.46	$ 0.47	$ 1.42
Diluted earnings per share (in dollars per share)	0.28	0.44	0.46	1.38
Dividends Declared Per Common Share (in dollars per share)	$ 0.07	$ 0.07	$ 0.21	$ 0.21
Comprehensive Income:
Net Income	$ 15,672	$ 21,567	$ 29,887	$ 61,800
Other Comprehensive Income (Note 6)
Amortization of pension and postretirement plans, net of income tax expense of $1,117, $1,088, $3,353 and $3,261.	2,032	1,974	6,093	5,881
Total other comprehensive income	2,032	1,974	6,093	5,881
Comprehensive Income	$ 17,704	$ 23,541	$ 35,980	$ 67,681