Stock-Based Compensation, Stock-Based Compensation Expense (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Stock-Based Compensation Expense [Abstract] |
|
|
|
| Stock-based compensation expense (income) |
$ 9,909
|
$ 26,609
|
$ 19,314
|
| Stock Options [Member] |
|
|
|
| Unrecognized Stock-Based Compensation Expense [Abstract] |
|
|
|
| Unrecognized stock-based compensation expense |
$ 300
|
|
|
| Unrecognized stock-based compensation expense, period for recognition |
1 month 6 days
|
|
|
| Restricted Stock Awards [Member] |
|
|
|
| Unrecognized Stock-Based Compensation Expense [Abstract] |
|
|
|
| Unrecognized stock-based compensation expense |
$ 21,800
|
|
|
| Unrecognized stock-based compensation expense, period for recognition |
2 years 7 months 6 days
|
|
|
| Service-Based Options [Member] |
|
|
|
| Stock-Based Compensation Expense [Abstract] |
|
|
|
| Stock-based compensation expense (income) |
$ 2,600
|
3,100
|
4,000
|
| Service-Based Restricted Stock Units [Member] |
|
|
|
| Stock-Based Compensation Expense [Abstract] |
|
|
|
| Stock-based compensation expense (income) |
11,500
|
11,200
|
11,300
|
| Performance-Based Options [Member] |
|
|
|
| Stock-Based Compensation Expense [Abstract] |
|
|
|
| Stock-based compensation expense (income) |
(4,100)
|
12,200
|
(3,900)
|
| Performance Stock Units [Member] |
|
|
|
| Stock-Based Compensation Expense [Abstract] |
|
|
|
| Stock-based compensation expense (income) |
$ 100
|
$ 100
|
$ 100
|