Consolidated Statements of Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	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, 2014	45,537
Balance at Dec. 31, 2014	$ 46	$ 742,006	$ 41,539	$ (8,668)	$ 774,923	$ 11,823	$ 786,746
Stock-based compensation		2,156			2,156		2,156
Exercise of options by employees and directors (in shares)	469
Exercise of options by employees and directors		3,966			3,966		3,966
Share exchange with Parent (in shares)	2,996
Share exchange with Parent	$ 3	25,754			25,757		25,757
Cash paid to non controlling interest						(432)	(432)
Cash dividend declared			(6,830)		(6,830)		(6,830)
Issuance of shares to noncontrolling interest, net of transaction costs		71,291			71,291	85,470	156,761
Net income			24,446		24,446	1,094	25,540
Loss in respect of derivative instruments designated for cash flow hedge				46	46		46
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment				164	164		164
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge				(61)	(61)		(61)
Balance (in shares) at Jun. 30, 2015	49,002
Balance at Jun. 30, 2015	$ 49	845,173	59,155	(8,519)	895,858	97,955	993,813
Balance (in shares) at Dec. 31, 2015	49,107
Balance at Dec. 31, 2015	$ 49	849,223	148,396	(7,667)	990,001	93,873	1,083,874
Stock-based compensation		1,659			1,659		1,659
Exercise of options by employees and directors (in shares)	460
Exercise of options by employees and directors		5,945			5,945		5,945
Cash paid to non controlling interest						(5,752)	(5,752)
Cash dividend declared			(18,998)		(18,998)		(18,998)
Net income			53,620		53,620	2,258	55,878
Loss in respect of derivative instruments designated for cash flow hedge				43	43		43
Change in unrealized gains or losses in respect of the Company's share in derivatives instruments of unconsolidated investment				(5,166)	(5,166)		(5,166)
Amortization of unrealized gains in respect of derivative instruments designated for cash flow hedge				(48)	(48)		(48)
Balance (in shares) at Jun. 30, 2016	49,567
Balance at Jun. 30, 2016	$ 49	$ 856,827	$ 183,018	$ (12,838)	$ 1,027,056	$ 90,379	$ 1,117,435