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Equity (Tables)
9 Months Ended
Sep. 30, 2017
Stockholders' Equity Note [Abstract]  
Summary of changes in equity
The following summarizes the changes in equity for the nine months ended September 30, 2017 (dollars in thousands):
 
Common
stock
 
Additional
paid-in
capital
 
Accumulated
earnings
less
dividends
 
Accumulated
other
comprehensive
loss
 
Total
equity
 
 
 
 
 
 
 
 
 
 
Balance at December 31, 2016
$
1,373

 
$
10,105,654

 
$
94,899

 
$
(30,510
)
 
$
10,171,416

Net income attributable to common stockholders

 

 
639,348

 

 
639,348

Loss on cash flow hedges, net

 

 

 
(15,654
)
 
(15,654
)
Cash flow hedge loss reclassified to earnings

 

 

 
5,301

 
5,301

Change in redemption value of redeemable noncontrolling interest

 

 
(458
)
 

 
(458
)
Dividends declared to common stockholders

 

 
(587,819
)
 

 
(587,819
)
Issuance of common stock, net of withholdings
8

 
100,625

 
(1,323
)
 

 
99,310

Amortization of deferred compensation

 
22,369

 

 

 
22,369

Balance at September 30, 2017
$
1,381

 
$
10,228,648

 
$
144,647

 
$
(40,863
)
 
$
10,333,813