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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended		6 Months Ended
	Jun. 22, 2016	May 25, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost			$ 49,100		$ 49,100
Total intrinsic value of options exercised					22,592
Aggregate intrinsic value of options exercisable			$ 198,296		$ 198,296
Market value of Company's common stock			$ 48.11		$ 48.11
Weighted average exercise price per share			$ 21.70		$ 21.70
Total options that were outstanding			17,897		17,897
Total options that were exercisable			7,509		7,509
Dividends declared per common share		$ 0.26	$ 0.26	$ 0.24	$ 0.26	$ 0.24
Cash dividends declared on the Company's common stock					$ 42,001	$ 39,852
Cash dividends paid per common share	$ 0.26
Common Stock Buyback [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased and retired					3,587
Company purchased, cost					$ 154,118
Remaining stock repurchase authorization amount			$ 159,008		$ 159,008
2014 Plan [Member] | Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate					50.00%
2014 Plan [Member] | Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate					50.00%

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Aggregate dividends paid during the period for each share of common stock outstanding.

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