Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Geographic information [Line Items]
Total Revenue	$ 80,189	$ 77,686	$ 76,530	$ 69,766	$ 71,124	$ 72,258	$ 72,770	$ 85,435	$ 304,171	$ 301,587
Identifiable assets	722,361				709,966				722,361	709,966
U.S.
Geographic information [Line Items]
Total Revenue									261,751	268,605
Identifiable assets	651,452				654,055				651,452	654,055
Latin America
Geographic information [Line Items]
Total Revenue									33,089	26,872
Identifiable assets	59,396				51,424				59,396	51,424
Canada
Geographic information [Line Items]
Total Revenue									4,027	3,442
Identifiable assets	4,081				4,487				4,081	4,487
Egypt
Geographic information [Line Items]
Total Revenue									3,430	0
Identifiable assets	$ 7,432				$ 0				7,432	0
Other
Geographic information [Line Items]
Total Revenue									$ 1,874	$ 2,668