Consolidated Statement of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 37,963	$ 38,193	$ 33,135
Supplemental Cash Flow Information
Income taxes paid	$ 4,429	$ 2,248	$ 4,721