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LONG-TERM INCENTIVE EMPLOYEE COMPENSATION
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
LONG-TERM INCENTIVE EMPLOYEE COMPENSATION
LONG-TERM INCENTIVE EMPLOYEE COMPENSATION
Our long-term incentive plan (LTIP) costs are primarily recorded within general and administrative expenses. The following table provides the components of LTIP costs for the three and nine months ended September 30, 2017 and 2016.
 
Three Months
 
Nine Months
For the Periods Ended September 30
2017
 
2016
 
2017
 
2016
Equity based awards
$
5.2

 
$
3.2

 
$
12.5

 
$
9.1

Liability-based awards
0.8

 
0.4

 
1.7

 
1.2

Total share-based compensation expense
$
6.0

 
$
3.6

 
$
14.2

 
$
10.3


At September 30, 2017, there was $21.3 of total unrecognized compensation cost related to non-vested equity awards. This cost is expected to be recognized ratably over a weighted-average period of 1.9 years. Additionally, unrecognized compensation cost related to liability-based awards was $3.0, which is expected to be recognized ratably over a weighted-average period of 1.9 years.
Year-to-Date 2017 LTIP Activity
The majority of our LTIP awards are granted during the first quarter of each year and vest on the completion of a three-year service period. During the nine months ended September 30, 2017, we granted the following LTIP awards as provided in the table below:
 
# of Awards Granted
Weighted Average Grant Date Fair Value Per Share
Restricted stock units (RSUs)
0.4
 
$
41.86

 
Performance stock units (PSUs)
0.1
 
$
44.87

 

During the nine months ended September 30, 2017 and 2016, 0.3 and 0.4 non-qualified stock options were exercised resulting in proceeds of $6.7 and $8.8, respectively. During the nine months ended September 30, 2017 and 2016, RSUs of 0.2 and 0.3 vested and were issued, respectively. There were no PSUs that vested on December 31, 2016 because the minimum performance requirements were not met. PSUs of 0.2 were issued during the nine months ended September 30, 2016 that vested on December 31, 2015.