Stockholders' Equity Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sep. 01, 2018 |
Jun. 01, 2018 |
Mar. 01, 2018 |
Sep. 01, 2017 |
Jun. 01, 2017 |
Mar. 01, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Equity [Abstract] | ||||||||||
| Dividends declared per common share (in dollars per Share) | $ 0.075 | $ 0.075 | $ 0.075 | $ 0.050 | $ 0.05 | $ 0.05 | $ 0.075 | $ 0.05 | $ 0.225 | $ 0.150 |
| Dividends | $ 1,436 | $ 1,433 | $ 1,207 | $ 835 | $ 835 | $ 833 | ||||