CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Cumulative effect adjustments on adoption of new accounting standards (Note 1-H and Note 7)	Common  Stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Cumulative effect adjustments on adoption of new accounting standards (Note 1-H and Note 7)	Retained Earnings	Retained Earnings Cumulative effect adjustments on adoption of new accounting standards (Note 1-H and Note 7)	Treasury stock	Noncontrolling interests
Beginning balance at Dec. 31, 2017	$ 678,810	$ 0	$ 24,072	$ 159,954	$ (847)	$ (3,592)	$ 491,698	$ 3,592	$ (2,666)	$ 6,599
Increase (Decrease) in Stockholders' Equity
Net income	47,523						47,523
Dividends on Common Stock ($1.20 per share)	(28,565)						(28,565)
Stock compensation	4,809		29	4,780
Stock repurchases	(1,175)		(29)	(1,146)
Purchase of remaining interest of consolidated subsidiary	(1,101)			(946)						(155)
Change in net unrealized gains and losses on investments, net of taxes	(8,922)				(8,922)
Reclassification adjustment for realized gains and losses on investments, net of taxes	(922)				(922)
Foreign currency translation adjustments (net of tax)	(10,488)				(10,488)
Net income attributable to noncontrolling interests	11,499									11,499
Distributions to noncontrolling interests	(11,631)									(11,631)
Ending balance at Dec. 31, 2018	679,837		24,072	162,642	(24,771)		514,248		(2,666)	6,312
Increase (Decrease) in Stockholders' Equity
Net income	78,615						78,615
Dividends on Common Stock ($1.20 per share)	(28,471)						(28,471)
Stock compensation	2,097		3	2,094
Stock repurchases	(532)		(13)	(519)
Change in net unrealized gains and losses on investments, net of taxes	15,184				15,184
Reclassification adjustment for realized gains and losses on investments, net of taxes	410				410
Foreign currency translation adjustments (net of tax)	6,478				6,478
Net income attributable to noncontrolling interests	11,657									11,657
Distributions to noncontrolling interests	(11,506)									(11,506)
Net effect of changes in ownership and other	(10)									(10)
Ending balance at Dec. 31, 2019	753,759		24,062	164,217	(2,699)		564,392		(2,666)	6,453
Increase (Decrease) in Stockholders' Equity
Net income	154,905						154,905
Dividends on Common Stock ($1.20 per share)	(30,478)						(30,478)
Issuance of Common Stock	108,961		3,026	105,935
Stock compensation	5,751		18	5,733
Stock repurchases	(1,054)		(26)	(1,028)
Change in net unrealized gains and losses on investments, net of taxes	15,443				15,443
Reclassification adjustment for realized gains and losses on investments, net of taxes	(511)				(511)
Foreign currency translation adjustments (net of tax)	4,789				4,789
Net income attributable to noncontrolling interests	14,767									14,767
Distributions to noncontrolling interests	(13,944)									(13,944)
Net effect of changes in ownership and other	18									18
Ending balance at Dec. 31, 2020	$ 1,012,406		$ 27,080	$ 274,857	$ 17,022		$ 688,819		$ (2,666)	$ 7,294