Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Income Statement [Abstract] | |||
| Depreciation | $ 7,567 | $ 9,835 | $ 11,429 |
| X | ||||||||||
- Definition Amount of expense for allocation of cost of tangible asset over its useful life directly used in production of good and rendering of service. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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