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Stockholders Equity (Tables)
 3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Schedule of changes in equity
A schedule of consolidated changes in equity for the three months ended March 31, 2019 is as follows (shares in thousands):
 
 
Common
Stock
(Number of
Shares)
 
Common
Stock
(Amount)
 
Additional
Paid-In
Capital
 
Treasury
Stock
(Number of
Shares)
 
Treasury
Stock (Amount)
 
Retained
Earnings
 
Accumulated
Other
Non-Owner
Changes to
Equity
 
Total
Stockholders’
Equity
December 31, 2018
 
63,367

 
$
634

 
$
470,818

 
12,034

 
$
(441,668
)
 
$
1,363,772

 
$
(190,500
)
 
$
1,203,056

Comprehensive income
 
 
 
 
 
 
 
 
 
 
 
33,992

 
(8,178
)
 
25,814

Dividends declared ($0.16 per share)
 
 
 
 
 
 
 
 
 
 
 
(8,217
)
 
 
 
(8,217
)
Employee stock plans
 
51

 
 
 
4,039

 
1

 
(80
)
 
(109
)
 
 
 
3,850

March 31, 2019
 
63,418

 
$
634

 
$
474,857

 
12,035

 
$
(441,748
)
 
$
1,389,438

 
$
(198,678
)
 
$
1,224,503


A schedule of consolidated changes in equity for the three months ended March 31, 2018 is as follows (shares in thousands):
 
 
Common
Stock
(Number of
Shares)
 
Common
Stock
(Amount)
 
Additional
Paid-In
Capital
 
Treasury
Stock
(Number of
Shares)
 
Treasury
Stock (Amount)
 
Retained
Earnings
 
Accumulated
Other
Non-Owner
Changes to
Equity
 
Total
Stockholders’
Equity
December 31, 2017
 
63,034

 
$
630

 
$
457,365

 
9,656

 
$
(297,998
)
 
$
1,206,723

 
$
(106,399
)
 
$
1,260,321

Comprehensive income
 
 
 
 
 
 
 
 
 
 
 
38,818

 
30,513

 
69,331

Dividends declared ($0.14 per share)
 
 
 
 
 
 
 
 
 
 
 
(7,453
)
 
 
 
(7,453
)
Common stock repurchases
 
 
 
 
 
 
 
533

 
(33,541
)
 
 
 
 
 
(33,541
)
Reclassification pursuant to
accounting guidance related to
U.S. Tax Reform (Note 3)


 
 
 
 
 
 
 
 
 
 
 
19,331

 
(19,331
)
 
—

Cumulative effect of change in accounting guidance related to Revenue (Note 3)
 
 
 
 
 
 
 
 
 
 
 
4,295

 
 
 
4,295

Employee stock plans
 
20

 
1

 
2,874

 
1

 
(68
)
 
(174
)
 
 
 
2,633

March 31, 2018
 
63,054

 
$
631

 
$
460,239

 
10,190

 
$
(331,607
)
 
$
1,261,540

 
$
(95,217
)
 
$
1,295,586