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Note 8 - Stock-based Compensation
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
8.
Stock-Based Compensation
 
For the
three
months ended
March 31, 2018
and
2017,
the Company’s net income, as reported, includes
$3.4
million and
$3.1
million, respectively, of stock-based compensation costs and
$0.7
million and
$1.0
million of income tax benefits, respectively, related to the stock-based compensation plans in each of the periods. During the
three
months ended
March 31, 2018
and
2017,
the Company granted
274,990
and
276,900
restricted stock units, respectively. There were
no
stock options granted or exercised during the
three
months ended
March 31, 2018
and
2017.
The Company has
not
granted stock options since
2009.
At
March 31, 2018,
the Company had
1,200
stock options, all
100%
vested, outstanding, at an average exercise price of
$13.91
per share.
 
The Company uses the fair value of the common stock on the date of award to measure compensation cost for restricted stock unit awards. Compensation cost is recognized over the vesting period of the award using the straight-line method.
 
The following table summarizes the Company’s restricted stock unit (“RSU”) awards at or for the
three
months ended
March 31, 2018:
 
        Weighted-Average
        Grant-Date
    Shares   Fair Value
Non-vested at December 31, 2017    
497,322
    $
22.46
 
Granted    
274,990
     
28.21
 
Vested    
(238,249
)    
23.64
 
Forfeited    
(6,005
)    
25.24
 
Non-vested at March 31, 2018    
528,058
    $
24.89
 
                 
Vested but unissued at March 31, 2018    
233,449
    $
25.15
 
 
As of
March 31, 2018,
there was
$11.9
million of total unrecognized compensation cost related to RSU awards granted. That cost is expected to be recognized over a weighted-average period of
3.3
years. The total fair value of awards vested for the
three
months ended
March 31, 2018
and
2017
was
$6.7
and
$7.0
million, respectively. The vested but unissued RSU awards consist of awards made to employees and directors who are eligible for retirement. According to the terms of these awards, which provide for vesting upon retirement, these employees and directors have
no
risk of forfeiture. These shares will be issued at the original contractual vesting and settlement dates.
 
Phantom Stock Plan:
The Company maintains a non-qualified phantom stock plan as a supplement to its profit sharing plan for officers who have achieved the designated level and completed
one
year of service. The Company adjusts its liability under this plan to the fair value of the shares at the end of each period.
 
The following table summarizes the Phantom Stock Plan at or for the
three
months ended
March 31, 2018:
 
Phantom Stock Plan   Shares   Fair Value
Outstanding at December 31, 2017    
89,180
    $
27.50
 
Granted    
8,200
     
27.90
 
Forfeited    
-
     
-
 
Distributions    
(24
)    
27.57
 
Outstanding at March 31, 2018    
97,356
    $
26.96
 
Vested at March 31, 2018    
96,509
    $
26.96
 
 
The Company recorded stock-based compensation benefit for the Phantom Stock Plan of
$37,000
and
$0.2
million for the
three
months ended
March 31, 2018
and
2017,
respectively. The total fair value of the distributions from the Phantom Stock Plan was
$1,000
and
$6,000
for the
three
months ended
March 31, 2018
and
2017,
respectively.