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Stock-Based Compensation and Other Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2017
Share-based Compensation [Abstract]  
Schedule of Activity, Restricted Shares
Activity, restricted shares: (a)
Restricted
Shares
 
Per Share Weighted Average Grant Date Fair Value
Non-vested restricted shares, as of December 31, 2016
1,970,586

 
$
21.61

Granted
193,348

 
39.47

Vested
(304,211
)
 
40.72

Canceled/forfeited
(30,041
)
 
20.24

Non-vested restricted shares, as of September 30, 2017
1,829,682

 
$
20.34


(a)
Includes 39,050 and 43,300 restricted stock units as of September 30, 2017 and December 31, 2016, respectively.
Schedule of Activity, Employee Stock Purchase Plans
The following table provides details pertaining to the Company’s ESPPs for the periods indicated:
 
For the Nine Months Ended September 30
 
2017
 
2016
Cash proceeds (in millions)
$
2.4

 
$
2.0

Common shares issued
68,789

 
115,556

Weighted average price per share
$
34.72

 
$
16.88

Weighted average per share grant date fair value
$
9.00

 
$
4.58
Schedule of Non-Cash Stock-Based Compensation Expense and Related Tax Effects
Details of non-cash stock-based compensation expense and related tax effects for the periods indicated were as follows (in millions):
 
For the Three Months Ended September 30
 
For the Nine Months Ended September 30
 
2017
 
2016
 
2017
 
2016
Non-cash stock-based compensation expense
$
3.4

 
$
3.9

 
$
10.5

 
$
11.3

Income Tax Effects:
 
 
 
 
 
 
 
Income tax effect of non-cash stock-based compensation
$
1.3

 
$
1.7

 
$
3.8

 
$
5.6

Excess tax benefit from non-cash stock-based compensation (a)
$
0.0

 
$
0.3

 
$
0.1

 
$
1.4

(a)
Excess tax benefits represent cash flows from tax deductions in excess of the tax effect of compensation expense associated with share-based payment arrangements. For the nine month period ended September 30, 2017, the Company incurred a net tax deficiency of $0.1 million related to the vesting of share-based payment awards and excess tax benefits were de minimis. As discussed in Note 1 - Business, Basis of Presentation and Significant Accounting Policies, the Company adopted ASU 2016-09 effective January 1, 2017 on a prospective basis. ASU 2016-09 changed the required presentation of excess tax benefits in the consolidated statement of cash flows from financing activities to operating activities. Excess tax benefits for the comparative prior year period are classified as cash flows from financing activities.