Segment Information (Details) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 74.50% | 74.00% |
| Revenue [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 100.00% | 100.00% |
| Revenue [Member] | U.S. [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 57.20% | 63.40% |
| Revenue [Member] | Canada [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 2.70% | 5.10% |
| Revenue [Member] | U.K. [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 22.30% | 22.20% |
| Revenue [Member] | Other foreign markets [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Total consolidated revenue | 17.80% | 9.30% |