Stock-Based Compensation Plans (Details 3) (USD $)	0 Months Ended	12 Months Ended
	Jan. 02, 2014 item	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 1996
Additional disclosures
Stock-based compensation expense		$ 17,775,000	$ 9,961,000	$ 9,721,000
Capitalized stock-based compensation cost		8,379,000	5,140,000	5,284,000
Forfeiture rate (as a percent)		1.40%
Employee Stock Purchase Plan
Shares issued under Employee Stock Purchase Plan		9,260
Stock-based compensation expense		17,775,000	9,961,000	9,721,000
Stock Options
Additional disclosures
Weighted average fair value per share (in dollars per share)		$ 26.78	$ 29.11	$ 29.40
Weighted average assumptions
Life of option		5 years	5 years	7 years
Dividend yield (as a percent)		3.70%	3.50%	4.00%
Volatility (as a percent)		34.00%	35.00%	35.00%
Risk-free interest rate (as a percent)		0.91%	0.87%	3.04%
Additional disclosures
Unrecognized compensation cost for unvested stock options		2,674,000
Weighted average period for recognition of unrecognized compensation cost		1 year 9 months 18 days
Forfeiture rate (as a percent)		1.40%
Restricted stock
Additional disclosures
Outstanding unvested shares granted		182,083	202,218
Restricted stock awards issued		123,977
Restricted stock vesting during period		16,019,000
Shares vested		141,673
Total fair value of shares vested		14,832,000	36,337,000	35,029,000
Unrecognized compensation cost for unvested restricted stock		7,889,000
Weighted average period for recognition of unrecognized compensation cost		2 years 6 months
Restricted stock | Minimum
Additional disclosures
Grant date fair value per share (in dollars per share)		$ 48.60
Restricted stock | Maximum
Additional disclosures
Grant date fair value per share (in dollars per share)		$ 149.05
Restricted stock units
Weighted average assumptions
Dividend yield (as a percent)		3.30%
Percentage of granted award which will vest		33.00%
Award vesting period		3 years
Measurement period for total shareholder return of the Company's common stock		3 years
Additional disclosures
Restricted stock granted (in shares)		191,008
Unrecognized compensation cost for unvested restricted stock		13,371,000
Baseline share value (in dollars per share)		$ 130.23
Estimated volatility, Minimum (as a percent)		17.00%
Estimated volatility, Maximum (as a percent)		21.00%
Historical volatility (as a percent)		50.00%
Implied volatility (as a percent)		50.00%
Risk-free interest rate, minimum (as a percent)		0.09%
Risk-free interest rate, maximum (as a percent)		0.46%
Average estimated fair value (in dollars per share)		$ 70.00
Restricted stock units | Maximum
Weighted average assumptions
Percentage of stock based compensation elected to be received in the form of stock options upon the election of the recipient		25.00%
Non-Qualified Employee Stock Purchase Plan
Additional disclosures
Stock-based compensation expense		174,000	127,000	216,000
Employee Stock Purchase Plan
Employee stock purchase plan, shares of common stock reserved for issuance					1,000,000
Employee stock purchase plan, remaining shares of common stock available for issuance		724,675
Employment period of full-time employees for becoming eligible to participate in the plan		1 month
Employment period of other employees for becoming eligible to participate in the plan		12 months
Purchase period	6 months	7 months
Number of purchase periods	2
Employee stock purchase plan, discounted stock price percentage		85.00%
Shares issued under Employee Stock Purchase Plan		9,260	6,260	6,972
Stock-based compensation expense		$ 174,000	$ 127,000	$ 216,000