Retirement Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014
Defined Contribution Plans
Employer match of employee contributions up to 3% of pretax annual compensation to 401 (k) defined contribution plan (as a percent)	100.00%
Percentage of participant's pretax annual compensation matched 100% by employer	3.00%
Employer match of employee contributions of additional 2% of pretax annual compensation to 401 (k) defined contribution plan (as a percent)	50.00%
Percentage of participant's pretax annual compensation matched 50% by employer	2.00%
Total expense recognized for 401(k) defined contribution plans	$ 65,118	$ 60,552	$ 57,857
Vesting period	5 years
Expense recognized for supplemental retirement defined contribution plan	$ 1,377	$ 8,748	11,531
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic pension expense
Net actuarial loss	4,529
Prior service cost	$ 0
Asset allocations
Total (as a percent)	100.00%	100.00%
Target allocation of plan assets
Total (as a percent)	100.00%
Equity Securities
Asset allocations
Total (as a percent)	49.00%	53.00%
U.S. equities
Target allocation of plan assets
Total (as a percent)	36.00%
International equity
Target allocation of plan assets
Total (as a percent)	13.00%
Fixed Income
Asset allocations
Total (as a percent)	51.00%	47.00%
Target allocation of plan assets
Total (as a percent)	51.00%
Defined Benefit Pension Plan
Net periodic pension expense
Service cost	$ 1,498	$ 2,543	3,341
Interest cost	6,398	6,474	6,120
Expected return on plan assets	(6,330)	(7,339)	(6,738)
Amortization of unrecognized prior service cost	67	240	240
Amortization of unrecognized net loss (gain)	3,690	2,392	4,935
Net pension expense	5,323	4,310	7,898
Other changes recognized in other comprehensive loss:
Unrecognized net (gain) loss arising during period	7,369	17,190	(18,860)
Amortization of unrecognized prior service cost	(67)	(240)	(240)
Amortization of unrecognized net (loss) gain	(3,690)	(2,392)	(4,935)
Net amount recognized in other comprehensive loss	3,612	14,558	(24,035)
Net amount recognized in pension expense and other comprehensive loss	8,935	18,868	(16,137)
Change in benefit obligations:
Benefit obligation at end of prior year	167,256	148,596
Service cost	1,498	2,543	3,341
Interest cost	6,398	6,474	6,120
Distributions	(7,408)	(12,190)
Actuarial (gain) loss	(11,270)	21,833
Benefit obligation at end of year	156,474	167,256	148,596
Change in plan assets:
Fair value of plan assets at beginning of year	129,934	128,984
Employer contributions	0	1,159	8,000
Actual return on plan assets	(12,309)	11,981
Distributions (including expenses paid by the plan)	(7,408)	(12,190)
Fair value of plan assets at end of year	110,217	129,934	$ 128,984
Funded status	(46,257)	(37,322)
Amounts recognized in consolidated balance sheets consisted of:
Accrued pension liability	(46,257)	(37,322)
Net amount recognized	(46,257)	(37,322)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss	(53,825)	(50,146)
Prior service cost		(67)
Amount recognized	(53,825)	(50,213)
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic pension expense
Accumulated benefit obligation	$ 156,474	$ 167,256
Significant actuarial assumptions used for all defined benefit plans to determine the benefit obligation
Discount rate (as a percent)	4.25%	4.00%	4.50%
Rate of increase in future compensation levels (as a percent)			4.50%
Expected long term rate of return on plan assets	6.50%	6.50%	7.75%
Weighted average assumptions used to determine net cost
Discount rate (as a percent)	4.00%	4.50%	4.00%
Rate of increase in future compensation levels (as a percent)			4.50%
Expected long-term rate of return on plan assets (as a percent)	6.50%	7.75%	7.75%
Defined benefit plans estimated future employer contributions
Expected employer contribution during next fiscal year	$ 0
Nonqualified Executive Retirement Plan
Defined Benefit Plans
Defined benefit plans, annual benefit payment period	15 years
Net periodic pension expense
Interest cost	$ 475	$ 542	$ 541
Amortization of unrecognized net loss (gain)	(574)	894	(351)
Net pension expense	(99)	1,436	190
Other changes recognized in other comprehensive loss:
Unrecognized net (gain) loss arising during period	(574)	894	(351)
Amortization of unrecognized net (loss) gain	574	(894)	351
Net amount recognized in pension expense and other comprehensive loss	(99)	1,436	190
Change in benefit obligations:
Benefit obligation at end of prior year	12,685	12,865
Interest cost	475	542	541
Distributions	(1,540)	(1,616)
Actuarial (gain) loss	(574)	894
Benefit obligation at end of year	11,046	12,685	$ 12,865
Change in plan assets:
Employer contributions	1,540	1,616
Distributions (including expenses paid by the plan)	(1,540)	(1,616)
Funded status	(11,046)	(12,685)
Amounts recognized in consolidated balance sheets consisted of:
Accrued pension liability	(11,046)	(12,685)
Net amount recognized	(11,046)	(12,685)
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic pension expense
Accumulated benefit obligation	$ 11,046	$ 12,685
Significant actuarial assumptions used for all defined benefit plans to determine the benefit obligation
Discount rate (as a percent)	4.25%	4.00%	4.50%
Weighted average assumptions used to determine net cost
Discount rate (as a percent)	4.00%	4.50%	4.00%
Defined benefit plans estimated future employer contributions
Expected employer contribution during next fiscal year	$ 1,602