STOCK PLANS - Activity (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 26, 2017 USD ($) $ / shares shares
RSUs
RSU's
Nonvested at the beginning of the period (in shares) | shares	204,145
Granted (in shares) | shares	151,905
Vested (in shares) | shares	(113,266)
Forfeited (in shares) | shares	(270)
Nonvested at the end of the period (in shares) | shares	242,514
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 18.17
Granted (in dollars per share) | $ / shares	11.50
Vested (in dollars per share) | $ / shares	21.13
Forfeited (in dollars per share) | $ / shares	23.40
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 12.60
Additional disclosures
Total fair value | $	$ 1.3
Stock options and SARs
Options/SARs
Outstanding at the beginning of the period (in shares) | shares	292,750
Expired (in shares) | shares	(1,850)
Outstanding at the end of the period (in shares) | shares	290,900
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 50.29
Expired (in dollars per share) | $ / shares	108.78
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 49.92