Income Taxes (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Income Taxes | ||||
| Federal income tax at U.S. statutory rate | 23.70% | 24.20% | 24.00% | 24.80% |
| Income Tax Expense (Benefit) | $ 8,058 | $ 6,562 | $ 17,343 | $ 16,430 |
| Valuation allowance, deferred tax assets | 0 | $ 0 | 0 | $ 0 |
| Unrecognized tax benefits | 2,300 | 2,300 | ||
| Unrecognized tax benefits, net of federal benefit | 1,800 | 1,800 | ||
| Accrual for interest and penalties | $ 200 | $ 200 | ||