Income Taxes Net deferred tax asset (liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Valuation allowance adjustment	$ 44,200	$ 215,420
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	23,600
Deferred Tax Assets [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Other	220,823		$ 237,836
Non-deductible reserves and other	140,987		155,488
Inventory valuation reserves	359,964		476,673
Net operating loss (NOL) carryforwards:
Federal	187,817		367,302
State	224,316		274,686
Alternative minimum tax credits	53,917		44,161
Energy credit and charitable contribution carryforward	45,673		28,669
Deferred Tax Assets, Gross	1,233,497		1,584,815
Deferred Tax Liabilities [Abstract]
Capitalized items, including real estate basis differences, deducted for tax, net	(82,445)		(39,220)
Trademarks and tradenames	(36,781)		(41,664)
Deferred Tax Liabilities, Gross	(119,226)		(80,884)
Valuation allowance	(64,863)		(109,052)
Net deferred tax asset (liability)	$ 1,049,408		$ 1,394,879
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2030
Minimum [Member] | 2016 to 2020 [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2017
Minimum [Member] | 2021 to 2025 [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2022
Minimum [Member] | Net Operating Loss (NOL) Expiration Period energy credit [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2026
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2032
Maximum [Member] | 2016 to 2020 [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2021
Maximum [Member] | Net Operating Loss (NOL) Expiration Period energy credit [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Jan. 01, 2036