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Components of Equity (Tables)
 9 Months Ended
Sep. 30, 2014
Stockholders' Equity Note [Abstract]  
Schedule of Components of Equity Disclosure
The components of equity for the nine months ended September 30, 2014 and 2013 are as follows:
 
Shareholders’
equity
 
Noncontrolling
interest
 
Total
equity
Balance at December 31, 2013
$
2,084,783

 
1,548

 
2,086,331

Exercise of stock options
34,669

 
—

 
34,669

Issuance of shares under stock purchase plan
23,800

 
—

 
23,800

Shares repurchased under provisions of stock repurchase plans
(475,160
)
 
—

 
(475,160
)
Stock compensation expense
32,220

 
—

 
32,220

Tax benefits from stock plans, net
1,031

 
—

 
1,031

Net earnings
277,507

 
1,213

 
278,720

Other comprehensive loss
(15,513
)
 
(119
)
 
(15,632
)
Dividends paid ($0.32 per share)
(62,807
)
 
—

 
(62,807
)
Purchase of noncontrolling interest
843

 
—

 
843

Distributions to noncontrolling interest
—

 
(85
)
 
(85
)
Balance at September 30, 2014
$
1,901,373

 
2,557

 
1,903,930

 
 
 
 
 
 
Balance at December 31, 2012
$
2,027,699

 
4,871

 
2,032,570

Exercise of stock options
28,115

 
—

 
28,115

Issuance of shares under stock purchase plan
23,977

 
—

 
23,977

Shares repurchased under provisions of stock repurchase plans
(125,206
)
 
—

 
(125,206
)
Stock compensation expense
33,060

 
—

 
33,060

Tax benefits from stock plans, net
1,280

 
—

 
1,280

Net earnings
265,030

 
972

 
266,002

Other comprehensive loss
(11,970
)
 
(305
)
 
(12,275
)
Dividends paid ($0.30 per share)
(61,899
)
 
—

 
(61,899
)
Purchase of noncontrolling interest
(507
)
 
(3,226
)
 
(3,733
)
Distributions to noncontrolling interest
—

 
(1,161
)
 
(1,161
)
Balance at September 30, 2013
$
2,179,579

 
1,151

 
2,180,730