Description of Business and Summary of Significant Accounting Policies (Warranty) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Product Warranty | |||
| Product warranty period | 2 years | ||
| Changes in the product warranty liability | |||
| Balance at beginning of period | $ 1,191 | $ 1,213 | $ 1,155 |
| Warranty costs accrued | 2,068 | 1,145 | 1,025 |
| Warranty claims | (1,844) | (1,167) | (967) |
| Balance at end of period | $ 1,415 | $ 1,191 | $ 1,213 |