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Deferred compensation (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Summary of amounts related to cash LTIP
A summary of compensation expense for our cash awards is presented below:
 
 
Three months ended March 31,
 
 
2020
 
2019
Cash LTIP expense (net of amounts capitalized)
 
$
167

 
$
91

Rollforward of unvested deferred compensation
A summary of our RSU activity is presented below:
 
 
Equity classified RSUs
 
 
Service-condition RSUs
 
 
 
Market condition RSUs
 
 
Weighted average
award date fair value
 
Restricted
units
 
Vest date
fair value
 
Weighted average
award date
fair value
 
Restricted
units
 
 
($ per share)
 
 
 
 
 
($ per share)
 
 
Unvested and outstanding at January 1, 2020
 
$
2.41

 
638,383

 
 
 
$
1.36

 
390,000

Granted
 
$

 

 
 
 
$

 

Vested
 
$

 

 
$

 
$

 

Forfeited
 
$
1.33

 
(76,621
)
 
 
 
$
1.36

 
(62,500
)
Unvested and outstanding at March 31, 2020
 
$
2.56

 
561,762

 
 
 
$
1.36

 
327,500

A summary of our RSA activity is presented below:
 
 
Time Shares
 
Performance Shares
 
 
Weighted
average
award date
fair value
 
Restricted
shares
 
Vest
date
fair
value
 
Weighted
average
award date
fair value
 
Restricted
shares
 
 
($ per share)
 
 
 
 
 
($ per share)
 
 
Unvested and outstanding at January 1, 2020
 
$
5.41

 
1,069,505

 
 
 
$
1.53

 
1,089,343

Granted
 
$

 

 
 
 
$

 

Vested
 
$
16.25

 
(83,130
)
 
$
88

 
$

 

Forfeited
 
$
20.05

 
(10,406
)
 
 
 
$

 

Cancelled
 
$
20.05

 
(12,088
)
 
 
 
$

 

Unvested and outstanding at March 31, 2020
 
$
4.14

 
963,881

 
 
 
$
1.53

 
1,089,343

 
 
Liability classified RSUs
 
 
Weighted average
award date fair value
 
Restricted
units
 
Vest date
fair value
 
 
($ per share)
 
 
 
 
Unvested and outstanding at January 1, 2020
 
$
4.57

 
75,779

 
 
Granted
 
$

 

 
 
Vested
 
$

 

 
$

Forfeited
 
$
17.66

 
(1,515
)
 
 
Unvested and outstanding at March 31, 2020
 
$
4.31

 
74,264

 
 
Stock-based compensation cost
Stock-based compensation expense is as follows for the periods indicated:
 
 
Three months ended March 31,
 
 
2020
 
2019
Stock-based compensation cost
 
$
670

 
$
1,460

Less: stock-based compensation cost capitalized
 
(274
)
 
(626
)
Stock-based compensation expense
 
$
396

 
$
834

Number of vested shares repurchased or settled in cash
 
3,856

 
80,422

Payments for stock-based compensation
 
6

 
463