Stockholders' Equity (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
	Jan. 25, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013
Payments for repurchases of common stock		$ 24,004	$ 30,712
Total unrecognized compensation cost related to non-vested stock-based compensation arrangements		$ 6,820
Unrecognized compensation cost is expected to be recognized over a weighted-average period		2 years 1 month 6 days
Forfeiture rate, Board of Directors		0.00%
Forfeiture rate, non-Board of Directors		9.00%
Stock Options [Member]
Vested contractual term, in years		10 years
Vesting rate		25.00%
Shares granted, Number of Shares		0
Vesting period, in years		4 years
Restricted Stock Award [Member]
Shares granted, Number of Shares		0
Restricted stock awards granted				24
Vesting period, in years		4 years
Service period for restricted stock award		4 years
2017 Plan [Member]
Stock-based compensation award date		Oct. 03, 2016
Stock-based compensation effective date		Sep. 14, 2016
Stock-based compensation, number of shares awarded, not granted		773
Subsequent Event [Member] | 2017 Plan [Member]
Subsequent event, date	Jan. 25, 2017
2016 Authorization [Member]
Authorized repurchase amount		$ 500,000
Payments for repurchases of common stock		$ 24,004
Repurchase period in years		3 years
Purchases of treasury stock, number of shares		350
10b5-1 Plan [Member]
Authorized repurchase amount			125,000
Payments for repurchases of common stock			$ 30,712
Purchases of treasury stock, number of shares			624