Nature of Business and Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for:
Interest	$ 20,806	$ 21,544	$ 14,183
Taxes	40,387	52,146	83,259
Stock Issued During Period, Value, Acquisitions	$ 7,335	$ 0	$ 0