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Shareholders' Equity
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Shareholders' Equity
Shareholders’ Equity
The following tables summarize the components of our shareholders’ equity and the changes therein as of and for the six months ended June 30, 2018:
 
December 31,
 
 
 
All Other
 
June 30,
 
2017
 
Net Income
 
Changes 1
 
2018
Common stock
$
150

 
$
—

 
$
1

 
$
151

Paid-in capital
194,123

 
—

 
1,857

 
195,980

Retained earnings
27,366

 
7,774

 
(2,659
)
 
32,481

Accumulated other comprehensive income
—

 
—

 
—

 
—

 
$
221,639

 
$
7,774

 
$
(801
)
 
$
228,612

_______________________
1 Includes equity-classified share-based compensation of $2.5 million during the six months ended June 30, 2018. During the six months ended June 30, 2018, 38,115 and 1,495 shares of common stock were issued in connection with the vesting of certain time-vested restricted stock units (“RSUs”) and performance restricted stock units (“PRSUs”), net of shares withheld for income taxes, respectively. This also includes a write-off of $2.7 million for certain accounts receivable attributable to natural gas imbalances accounted for under the entitlements method prior to January 1, 2018, in connection with the adoption of ASC Topic 606 (see Note 5).