Shareholders' Equity (Details Textual) (USD $)	0 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 01, 2012	Aug. 08, 2012	Nov. 30, 2012	Sep. 30, 2012	Dec. 31, 2012	Jan. 01, 2012	Jan. 02, 2011	Dec. 06, 2012	Aug. 31, 2012	Aug. 30, 2012	Apr. 24, 2012	Aug. 12, 2010
Shareholders Equity (Additional Textual) [Abstract]
Shares repurchased					57,457
Shares repurchased at an aggregate cost					$ (1,036,000)		$ (7,078,000)
Common Stock, Dividends, Per Share, Declared	$ 0.20	$ 0.20
Dividends, Common Stock, Cash			12,300,000	(12,300,000)	(102,435,000)
Special Dividend, Maximum Amount Of Cash Payable Above The Lottery Amount								20.00%
Capital Distribution, Special Dividend, Amount					352,200,000
Capital Distribution, Amount Per Share					$ 5.68
Stock Dividends, Shares					9,688,568
Capital Distribution, Special Dividend, Amount, Paid In Cash					77,800,000
Shareholders' Equity (Textual) [Abstract]
Common stock, voting rights					one vote per share
Preferred stock, shares authorized					30,000,000	30,000,000
Treasury Stock, Value, Acquired, Cost Method					(8,666,000)	(74,982,000)	(80,000,000)
Payments for purchase of treasury shares					(8,666,000)	(74,982,000)	(80,000,000)
Non-controlling interest in MCF as a percentage of equity												100.00%
Equity Method Investment, Ownership Percentage									100.00%	0.00%	100.00%
Payments of Ordinary Dividends, Noncontrolling Interest					5,758,000	4,012,000	0
Percentage of profit share of parent in joint venture					88.75%
Percentage of profit share of noncontrolling in joint venture					11.25%
South African Custodial Services Pty Limited
Shareholders' Equity (Textual) [Abstract]
Life term of contract					25 years
February Two-Thousand And Ten Stock Repurchase Program [Member]
Shareholders' Equity (Textual) [Abstract]
Number of shares to be repurchased under stock repurchase program							80,000,000
Shares of common stock repurchased							4,000,000
Payments for purchase of treasury shares							(80,000,000)
February Two-Thousand And Ten Stock Repurchase Program [Member] | Executive Officer [Member]
Shareholders Equity (Additional Textual) [Abstract]
Shares repurchased							1,100,000
Shares repurchased at an aggregate cost							22,300,000
February Two-Thousand And Ten Stock Repurchase Program [Member] | Directors and Executives [Member]
Shareholders Equity (Additional Textual) [Abstract]
Shares repurchased							300,000
Shares repurchased at an aggregate cost							7,100,000
July Two-Thousand And Eleven Stock Repurchase Program [Member]
Shareholders' Equity (Textual) [Abstract]
Number of shares to be repurchased under stock repurchase program						100,000,000
Shares of common stock repurchased					297,741	3,900,000
Treasury Stock, Value, Acquired, Cost Method					8,700,000	75,000,000
Residential Treatment Services [Member]
Shareholders' Equity (Textual) [Abstract]
Treasury Stock, Value, Acquired, Cost Method					$ 8,600,000
Residential Treatment Services [Member] | July Two-Thousand And Eleven Stock Repurchase Program [Member]
Shareholders' Equity (Textual) [Abstract]
Shares of common stock repurchased					295,959