Supplementary Disclosure of Consolidated Cash Flow Information - Summary of Cash and Restricted Cash (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash	$ 25,206	$ 11,906	$ 7,627
Restricted cash	302	0	0
Total cash and restricted cash shown in the Consolidated Statements of Cash Flows	25,508	11,906	7,627	$ 16,670
Interest	14,104	12,532	11,555
Income taxes	$ 22,946	$ 8,679	$ 16,259