XML 43 R30.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock option activity
The following table summarizes stock option activity during the years ended December 31, 2017, 2016 and 2015 (shares in thousands): 
 
 
Year Ended
 
Year Ended
 
Year Ended
 
 
December 31, 2017
 
December 31, 2016
 
December 31, 2015
 
 
Options
 
Weighted
Average
Exercise
Price
 
Options
 
Weighted
Average
Exercise
Price
 
Options
 
Weighted
Average
Exercise
Price
Outstanding at beginning of period
 
114

 
$
217.24

 
130

 
$
218.46

 
130

 
$
218.46

Forfeited
 
(8
)
 
$
200.95

 
(16
)
 
$
227.19

 
—

 
$
—

Expired
 
(62
)
 
$
193.13

 
—

 
$
—

 
—

 
$
—

Outstanding at end of period (1)
 
44

 
$
243.26

 
114

 
$
217.24

 
130

 
$
218.46

Options exercisable at end of period (2)
 
22

 
$
228.81

 
85

 
$
203.48

 
93

 
$
202.48

Available for grant at end of period
 
16

 
 
 
26

 
 
 
10

 
 
 
(1) 
Stock options outstanding at December 31, 2017 have a weighted average remaining contractual term of 3.7 years and there is no intrinsic value.
(2) 
Exercisable stock options at December 31, 2017 have a weighted average remaining contractual term of 3.1 years and there is no intrinsic value.