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Components of Equity (Tables)
 9 Months Ended
Sep. 30, 2018
Stockholders' Equity Note [Abstract]  
Schedule of Components of Equity Disclosure
The components of equity for the nine months ended September 30, 2018 and 2017 are as follows:
 
Shareholders’
equity
 
Noncontrolling
interest
 
Total
equity
Balance at December 31, 2017
$
1,991,858

 
2,515

 
1,994,373

Cumulative effect of accounting change
(22,357
)
 
(105
)
 
(22,462
)
Exercise of stock options and release of restricted awards, net of shares withheld for employee taxes
133,060

 
—

 
133,060

Issuance of shares under stock purchase plan
33,292

 
—

 
33,292

Shares repurchased under provisions of stock repurchase plans
(555,760
)
 
—

 
(555,760
)
Stock compensation expense
43,171

 
—

 
43,171

Net earnings
438,989

 
1,224

 
440,213

Other comprehensive loss
(27,135
)
 
(994
)
 
(28,129
)
Dividends paid ($0.45 per share)
(79,180
)
 
 
 
(79,180
)
Purchase of noncontrolling interest
(89
)
 
(524
)
 
(613
)
Distributions to noncontrolling interest
—

 
(633
)
 
(633
)
Balance at September 30, 2018
$
1,955,849

 
1,483

 
1,957,332

 
 
 
 
 
 
Balance at December 31, 2016
$
1,844,638

 
2,575

 
1,847,213

Exercise of stock options
134,014

 
—

 
134,014

Issuance of shares under stock purchase plan
28,767

 
 
 
28,767

Shares repurchased under provisions of stock repurchase plans
(340,736
)
 
—

 
(340,736
)
Stock compensation expense
39,036

 
—

 
39,036

Net earnings
322,378

 
550

 
322,928

Other comprehensive income
25,632

 
(47
)
 
25,585

Dividends paid ($0.42 per share)
$
(75,726
)
 
 
 
(75,726
)
Balance at September 30, 2017
$
1,978,003

 
3,078

 
1,981,081