Shareholders' Equity (Details) - USD ($)				1 Months Ended	9 Months Ended
	Jul. 29, 2015	Dec. 08, 2014	May. 01, 2013	Oct. 27, 2015	Sep. 25, 2015	Sep. 26, 2014	Dec. 26, 2014
Class of Stock [Line Items]
Preferred shares, shares authorized (shares)					50,000,000		50,000,000
Preferred shares, par value (usd per share)					$ 0.01		$ 0.01
Preferred shares, issued (shares)					0		0
Preferred shares, outstanding (shares)					0		0
Ordinary shares, authorized (shares)					200,000,000		200,000,000
Ordinary shares, par value (usd per share)					$ 0.01		$ 0.01
Ordinary shares, issued (shares)					52,590,851		53,899,923
Ordinary shares, outstanding (shares)					52,590,851		53,899,923
Stock Repurchase Program:
Duration of share repurchase program	3 years		3 years
Stock repurchase program, ordinary shares authorized	$ 300,000,000		$ 300,000,000
Stock repurchase program, value of ordinary shares repurchased and retired					$ 285,500,000
Stock repurchase program, ordinary shares repurchased and retired					8,909,491
Stock repurchased during period (shares)		2,363,996
Price paid per share (usd per share)		$ 34.50
Stock repurchase program, maximum remaining amount					$ 314,500,000
Payments of dividends, common stock					$ 19,700,000	$ 20,900,000
Subsequent Event
Stock Repurchase Program:
Stock repurchased during period (shares)				109,705
Payment for repurchase of shares				$ 4,300,000
Price paid per share (usd per share)				$ 39.29