STOCK PLANS - Activity (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 25, 2016 USD ($) $ / shares shares
RSUs
RSU's
Nonvested at the beginning of the period (in shares) | shares	153,880
Granted (in shares) | shares	124,690
Vested (in shares) | shares	(67,335)
Forfeited (in shares) | shares	(3,730)
Nonvested at the end of the period (in shares) | shares	207,505
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 29.83
Granted (in dollars per share) | $ / shares	10.62
Vested (in dollars per share) | $ / shares	30.90
Forfeited (in dollars per share) | $ / shares	15.78
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 18.19
Additional disclosures
Total fair value | $	$ 0.8
Stock options and SARs
Options/SARs
Outstanding at the beginning of the period (in shares) | shares	320,125
Forfeited (in shares) | shares	(50)
Expired (in shares) | shares	(8,225)
Outstanding at the end of the period (in shares) | shares	311,850
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 73.49
Forfeited (in dollars per share) | $ / shares	27.60
Expired (in dollars per share) | $ / shares	83.46
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 73.24