Income Taxes Unrecognized Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year	$ 2,726	$ 2,550	$ 2,438
Current period tax positions	292	593	523
Lapse of statute of limitations	(501)	(417)	(411)
Balance at end of year	2,517	2,726	$ 2,550
Lapse of statute of limitations, approximate reversal next fiscal year	460
Unrecognized tax benefits that would impact effective tax rate	549
Interest and penalties in income tax expense related to unrecognized tax positions	22	59
Income tax penalties and interest accrued	$ 697	$ 675