Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 81,949	$ 128,232
Alternative minimum tax credit carryforwards	7,307	7,450
Valuation allowance	129,159	163,225
Federal taxable income	112,500
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Unrecognized tax benefits that would impact effective tax rate	2,200
Unrecognized tax benefits, interest on income taxes expense	400
Unrecognized tax benefits, interest on income taxes accrued	3,200
Income Taxes Paid, Net [Abstract]
Income taxes receivable	2,000	$ 300
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	220,000
Federal and State Net Operating Loss Carry Forwards [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance	117,800
State Net Operating Loss [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 11,400