Condensed Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Cross Currency Interest Rate Contract [Member] Common Stock [Member]	Cross Currency Interest Rate Contract [Member] Additional Paid-in Capital [Member]	Cross Currency Interest Rate Contract [Member] Retained Earnings [Member]	Cross Currency Interest Rate Contract [Member] AOCI Attributable to Parent [Member]	Cross Currency Interest Rate Contract [Member] Parent [Member]	Cross Currency Interest Rate Contract [Member] Noncontrolling Interest [Member]	Cross Currency Interest Rate Contract [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2019									51,032														51,032
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2019		$ 0	$ 0	$ (755)	$ 0	$ (755)	$ 0	$ (755)	$ 51	$ 913,150	$ 487,118	$ (8,654)	$ 1,391,665	$ 122,990	$ 1,514,655								$ 51	$ 913,150	$ 487,873	$ (8,654)	$ 1,392,420	$ 122,990	$ 1,515,410
Stock-based compensation																							0	1,989	0	0	1,989	0	1,989
Cash paid to noncontrolling interest																							0	0	0	0	0	(3,007)	(3,007)
Cash dividend declared																							0	0	(5,614)	0	(5,614)	0	(5,614)
Increase in noncontrolling interest																							0	0	0	0	0	1,447	1,447
Net income																							0	0	26,033	0	26,033	3,543	29,576
Foreign currency translation adjustments																							0	0	0	(258)	(258)	(387)	(645)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	(4,755)	(4,755)	0	(4,755)
Other comprehensive income (loss)																							$ 0	0	0	5	5	0	5
Balance (in shares) at Mar. 31, 2020																							51,036
Balance in Other comprehensive income (loss) end of period at Mar. 31, 2020																							$ 51	915,139	507,537	(13,662)	1,409,065	124,586	1,533,651
Balance (in shares) at Dec. 31, 2019									51,032														51,032
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2019		$ 0	$ 0	$ (755)	$ 0	$ (755)	$ 0	$ (755)	$ 51	$ 913,150	$ 487,118	$ (8,654)	$ 1,391,665	$ 122,990	$ 1,514,655								$ 51	913,150	487,873	(8,654)	1,392,420	122,990	1,515,410
Foreign currency translation adjustments																													1,597
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																													(4,461)
Other comprehensive income (loss)																													47
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													0
Balance (in shares) at Sep. 30, 2020																							51,069
Balance in Other comprehensive income (loss) end of period at Sep. 30, 2020																							$ 51	920,210	534,984	(11,955)	1,443,290	132,061	1,575,351
Balance (in shares) at Mar. 31, 2020																							51,036
Balance in Other comprehensive income (loss) beginning of period at Mar. 31, 2020																							$ 51	915,139	507,537	(13,662)	1,409,065	124,586	1,533,651
Stock-based compensation																							0	2,264	0	0	2,264	0	2,264
Cash dividend declared																							0	0	(5,719)	0	(5,719)	0	(5,719)
Increase in noncontrolling interest																							0	0	0	0	0	1,307	1,307
Net income																							0	0	23,046	0	23,046	1,982	25,028
Foreign currency translation adjustments																							0	0	0	382	382	539	921
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	(653)	(653)	0	(653)
Other comprehensive income (loss)																							$ 0	0	0	12	12	0	12
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						31
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Balance (in shares) at Jun. 30, 2020																							51,067
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2020																							$ 51	917,403	524,864	(13,921)	1,428,397	128,414	1,556,811
Stock-based compensation																							0	2,807	0	0	2,807	0	2,807
Cash paid to noncontrolling interest																							0	0	0	0	0	(3,749)	(3,749)
Cash dividend declared																							0	0	(5,559)	0	(5,559)	0	(5,559)
Net income																							0	0	15,679	0	15,679	7,064	22,743
Foreign currency translation adjustments																							0	0	0	989	989	332	1,321
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	947	947	0	947
Other comprehensive income (loss)																							$ 0	0	0	30	30	0	30
Exercise of stock-based awards by employees and directors (*) (in shares)																							2
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													0
Balance (in shares) at Sep. 30, 2020																							51,069
Balance in Other comprehensive income (loss) end of period at Sep. 30, 2020																							$ 51	920,210	534,984	(11,955)	1,443,290	132,061	1,575,351
Balance (in shares) at Dec. 31, 2020																							55,983
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2020																							$ 56	1,262,446	550,103	(6,620)	1,805,985	135,452	1,941,437
Stock-based compensation																							0	2,097	0	0	2,097	0	2,097
Cash paid to noncontrolling interest																							0	0	0	0	0	(3,898)	(3,898)
Cash dividend declared																							0	0	(6,718)	0	(6,718)	0	(6,718)
Net income																							0	0	15,259	0	15,259	2,290	17,549
Foreign currency translation adjustments																							0	0	0	(1,253)	(1,253)	(573)	(1,826)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	3,755	3,755	0	3,755
Other comprehensive income (loss)																							$ 0	0	0	16	16	0	16
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						1
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Stock issuance costs reimbursement																							0	285	0	0	285	0	285
Change in respect of derivative instruments designated for cash flow hedge																$ 0	$ 0	$ 0	$ (2,798)	$ (2,798)	$ 0	$ (2,798)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																							$ 0	0	0	(20)	(20)	0	(20)
Balance (in shares) at Mar. 31, 2021																							55,984
Balance in Other comprehensive income (loss) end of period at Mar. 31, 2021																							$ 56	1,264,828	558,644	(6,920)	1,816,608	133,271	1,949,879
Balance (in shares) at Dec. 31, 2020																							55,983
Balance in Other comprehensive income (loss) beginning of period at Dec. 31, 2020																							$ 56	1,262,446	550,103	(6,620)	1,805,985	135,452	1,941,437
Foreign currency translation adjustments																													(2,042)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																													3,504
Other comprehensive income (loss)																													48
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																													(9)
Balance (in shares) at Sep. 30, 2021																							56,002
Balance in Other comprehensive income (loss) end of period at Sep. 30, 2021																							$ 56	1,269,568	573,408	(9,647)	1,833,385	138,971	1,972,356
Balance (in shares) at Mar. 31, 2021																							55,984
Balance in Other comprehensive income (loss) beginning of period at Mar. 31, 2021																							$ 56	1,264,828	558,644	(6,920)	1,816,608	133,271	1,949,879
Stock-based compensation																							0	2,623	0	0	2,623	0	2,623
Cash paid to noncontrolling interest																							0	0	0	0	0	(426)	(426)
Cash dividend declared																							0	0	(6,448)	0	(6,448)	0	(6,448)
Net income																							0	0	13,026	0	13,026	1,795	14,821
Foreign currency translation adjustments																							0	0	0	284	284	132	416
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	(1,234)	(1,234)	0	(1,234)
Other comprehensive income (loss)																							$ 0	0	0	17	17	0	17
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						13
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Change in respect of derivative instruments designated for cash flow hedge																							0	0	0	198	198	0	198
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																							$ 0	0	0	9	9	0	9
Balance (in shares) at Jun. 30, 2021																							55,997
Balance in Other comprehensive income (loss) end of period at Jun. 30, 2021																							$ 56	1,267,451	565,222	(7,646)	1,825,083	134,772	1,959,855
Stock-based compensation																							0	2,120	0	0	2,120	0	2,120
Cash paid to noncontrolling interest																							0	0	0	0	0	(1,487)	(1,487)
Cash dividend declared																							0	0	(6,716)	0	(6,716)	0	(6,716)
Net income																							0	0	14,902	0	14,902	6,011	20,913
Foreign currency translation adjustments																							0	0	0	(307)	(307)	(325)	(632)
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment that qualifies as a cash flow hedge																							0	0	0	983	983	0	983
Other comprehensive income (loss)																							$ 0	0	0	15	15	0	15
Exercise of stock-based awards by employees and directors (*) (in shares)	[1]																						5
Exercise of stock-based awards by employees and directors (*)	[1]																						$ 0	0	0	0	0	0	0
Change in respect of derivative instruments designated for cash flow hedge																							0	0	0	(2,694)	(2,694)	0	(2,694)
Change in unrealized gains or losses on marketable securities available-for-sale (net of related tax of $0)																							0	0	0	2	2	0	2
Stock issuance costs reimbursement																							$ 0	(3)	0	0	(3)	0	(3)
Balance (in shares) at Sep. 30, 2021																							56,002
Balance in Other comprehensive income (loss) end of period at Sep. 30, 2021																							$ 56	$ 1,269,568	$ 573,408	$ (9,647)	$ 1,833,385	$ 138,971	$ 1,972,356

[1] Resulted in an amount lower than $1 thousand.