Related Party Transactions (Summarized Financial Information of Company's Equity Method Investees) (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	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Revenues	$ 3,782,702	$ 2,998,824	$ 3,235,805	$ 2,594,719	$ 2,508,303	$ 1,885,586	$ 1,854,738	$ 1,815,993	$ 12,612,050	$ 8,064,620	$ 8,003,253
Gross profit									592,697	366,197	460,767
Income from continuing operations									99,662	5,754	7,123
Net income (loss)	62,344	$ 14,136	$ 46,124	$ 13,262	14,649	$ 2,215	$ 20,032	$ (51,111)	135,866	(14,215)	15,060
Current assets	3,372,328				2,416,409				3,372,328	2,416,409
Current liabilities	2,463,929				1,931,682				2,463,929	1,931,682
Noncontrolling interests	1,307,704				1,160,660				1,307,704	1,160,660	1,195,655	$ 876,764
Subsidiaries
Related Party Transaction [Line Items]
Revenues									2,021,128	1,625,686	1,930,289
Gross profit									31,185	32,467	39,253
Income from continuing operations									8,334	3,315	1,895
Net income (loss)									7,327	2,777	940
Current assets	374,856				370,190				374,856	370,190	255,052
Non-current assets	79,564				89,456				79,564	89,456	80,823
Current liabilities	286,530				296,074				286,530	296,074	196,163
Non-current liabilities	$ 32,877				$ 40,077				$ 32,877	$ 40,077	$ 31,509