Business Segment Information (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 3,358,741	$ 2,995,443	$ 2,482,700
Property and Equipment, net	336,601	345,381
Total Assets	5,403,633	4,744,276	4,926,711
UNITED STATES
Segment Reporting Information [Line Items]
Revenues	830,846	805,028	725,135
Property and Equipment, net	59,925	59,469
Total Assets	1,051,433	1,040,190
Non-US
Segment Reporting Information [Line Items]
Revenues	2,527,895	2,190,415	1,757,565
Property and Equipment, net	276,676	285,912
Total Assets	4,352,200	3,704,086
GERMANY
Segment Reporting Information [Line Items]
Revenues	644,488	631,550	533,999
Property and Equipment, net	30,222	32,126
Total Assets	772,575	901,724
SPAIN
Segment Reporting Information [Line Items]
Revenues	211,658	157,766	118,934
Property and Equipment, net	46,392	50,321
Total Assets	322,652	317,199
UNITED KINGDOM
Segment Reporting Information [Line Items]
Revenues	144,737	143,914	118,024
Property and Equipment, net	10,453	13,783
Total Assets	403,874	371,090
ITALY
Segment Reporting Information [Line Items]
Revenues	160,676	130,095	92,006
Property and Equipment, net	16,670	18,279
Total Assets	207,744	207,347
POLAND
Segment Reporting Information [Line Items]
Revenues	98,069	93,654	89,688
Property and Equipment, net	23,013	24,091
Total Assets	220,686	201,506
INDIA
Segment Reporting Information [Line Items]
Revenues	188,539	173,154	123,343
Property and Equipment, net	30,476	32,705
Total Assets	241,630	206,378
FRANCE
Segment Reporting Information [Line Items]
Revenues	173,825	166,655	119,265
Property and Equipment, net	8,514	7,038
Total Assets	140,396	134,981
GREECE
Segment Reporting Information [Line Items]
Revenues	160,971	61,627	39,705
Property and Equipment, net	18,032	10,815
Total Assets	597,206	80,778
MALAYSIA
Segment Reporting Information [Line Items]
Revenues	47,597	50,039	73,541
Property and Equipment, net	2,167	1,998
Total Assets	77,569	91,813
AUSTRALIA
Segment Reporting Information [Line Items]
Revenues	42,424	46,851	46,062
Property and Equipment, net	2,880	2,791
Total Assets	58,400	56,275
NEW ZEALAND
Segment Reporting Information [Line Items]
Revenues	61,550	56,480	47,368
Property and Equipment, net	3,537	3,949
Total Assets	234,836	231,468
NETHERLANDS
Segment Reporting Information [Line Items]
Revenues	54,634	49,442	39,630
Property and Equipment, net	5,302	6,280
Total Assets	196,667	217,521
CANADA
Segment Reporting Information [Line Items]
Revenues	66,439	46,851	49,487
Property and Equipment, net	744	847
Total Assets	106,419	103,056
BRAZIL
Segment Reporting Information [Line Items]
Revenues	51,367	44,304	28,473
Property and Equipment, net	258	268
Total Assets	46,695	34,115
Other Countries [Member]
Segment Reporting Information [Line Items]
Revenues	420,921	338,033	$ 238,040
Property and Equipment, net	78,016	80,621
Total Assets	$ 724,851	$ 548,835