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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
	May. 27, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Oct. 16, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 36,645		$ 36,645
Total intrinsic value of options exercised				58,294
Aggregate intrinsic value of options exercisable		$ 221,962		$ 221,962
Market value of Company's common stock		$ 48.23		$ 48.23
Weighted average exercise price per share		$ 20.30		$ 20.30
Total options that were outstanding		17,885		17,885
Total options that were exercisable		7,947		7,947
Dividends declared per common share	$ 0.24	$ 0.00	$ 0.00	$ 0.24	$ 0.22
Cash dividends declared on the Company's common stock				$ 39,852	$ 36,942
Common Stock Buyback [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased and retired				4,483
Company purchased, cost				$ 212,092
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%
Subsequent Event [Member] | Common Stock Buyback [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining stock repurchase authorization amount						$ 90,621

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