v3.8.0.1

SHAREHOLDER'S EQUITY (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Stockholders Equity Note Abstract |
Schedule of dividends payable on unvested restricted stock units |
|  |  |  | Dividend Equivalent Liabilities
|  | Balance Sheet |  | March 31, |  | December 31,
|  | Location |  | 2018 |  | 2017
|  |  |  | (amounts in thousands)
Short-term |  | Other current liabilities |  | $ | 604 |  | $ | 830
Long-term |  | Other long-term liabilities |  |  | 1,215 |  |  | 1,331
Total |  |  |  | $ | 1,819 |  | $ | 2,161
ESPP Shares Purchased and Non-Cash Comp Expense |
|  | Three Months Ended
|  | March 31,
|  | 2018 |  | 2017
|  | (amounts in thousands)
Number of shares purchased |  |  | 39 |  |  | 15
Non-cash compensation expense recognized |  | $ | 57 |  | $ | 32

X
- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_ScheduleOfDividendsPayableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of employee stock purchase plan activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration