Consolidated Statements of Changes in Redeemable Non-controlling Interests and Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Statement of Stockholders' Equity [Abstract] | |||
| Stock-based compensation expense, excess tax benefits | $ 0 | $ 99 | $ (50) |
| X | ||||||||||
- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). No definition available.
|
| X | ||||||||||
- References No definition available.
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