Property, Equipment and Software (Details) - USD ($) $ in Thousands |
Jun. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | $ 107,631 | $ 107,337 |
| Less accumulated depreciation | (30,172) | (24,623) |
| Total property, equipment and software, net | 77,459 | 82,714 |
| Furniture and Fixtures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | 14,689 | 16,439 |
| Land [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | 3,466 | 3,466 |
| Building and improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | 20,459 | 20,768 |
| Software [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | 5,738 | 5,853 |
| Capitalized website and software development costs [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, equipment and software, Gross | $ 63,279 | $ 60,811 |