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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Schedule Of Net Income Per Share
Net income per share was determined by dividing adjusted net income to shareholders by the applicable weighted average shares outstanding. Basic shares outstanding include restricted stock units that are no longer subject to any contingencies for issuance, but for which the corresponding shares have not been issued. Diluted net income per share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares and dilutive potential common shares outstanding during the year. Average closing common stock market prices are used to calculate the dilutive effect attributable to restricted stock.

 
Years Ended December 31,
(in thousands, except per share amounts)
2018
 
2017
 
2016
Net income (loss) to shareholders (1)
$
(128,180
)
 
$
395,269

 
$
455,689

Adjustment of redeemable noncontrolling interests
(4,828
)
 
(33,738
)
 
(15,472
)
Adjusted net income (loss) to shareholders
$
(133,008
)
 
$
361,531

 
$
440,217

 
 
 
 
 
 
Basic common shares outstanding
13,923

 
13,964

 
14,013

Dilutive potential common shares from options
—

 
1

 
4

Dilutive potential common shares from restricted stock units and restricted stock
—

 
41

 
61

Diluted shares outstanding
13,923

 
14,006

 
14,078

Basic net income (loss) per share
$
(9.55
)
 
$
25.89

 
$
31.41

Diluted net income (loss) per share (2)
$
(9.55
)
 
$
25.81

 
$
31.27


(1) 
Effective January 1, 2018, the Company adopted ASU No. 2016-01 and equity securities are no longer classified as available-for-sale with unrealized gains and losses recognized in other comprehensive income, rather, changes in the fair value of equity securities are now recognized in net income. Prior periods have not been restated to conform to the current presentation. See note 1.
(2) 
The impact of restricted stock units and restricted stock of 25 thousand shares was excluded from the computation of diluted earnings per share for the year ended December 31, 2018 because the effect would have been anti-dilutive.
Summary Of Nonvested Share-Based Awards
The following table summarizes nonvested share-based awards.

 
Number
of Awards
 
Weighted Average
Grant-Date
Fair Value
Nonvested awards at January 1, 2018
31,518

 
$
808.63

Granted
14,306

 
1,121.68

Vested
(24,535
)
 
779.65

Forfeited
(416
)
 
914.94

Nonvested awards at December 31, 2018
20,873

 
$
1,042.83