Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net cash provided by operating activities	$ 164,086	$ 65,326
Securities available-for-sale:
Purchases – fixed maturity securities	(178,600)	(196,208)
Sales – fixed maturity securities	65,275	33,723
Maturities and calls – fixed maturity securities	81,138	128,640
Purchases – equity securities	(5,949)	0
Sales – equity securities	3,179	409
Bank loan participations:
Purchases	(121,285)	(144,172)
Sales	77,933	79,959
Maturities	28,053	28,638
Other invested assets:
Purchases	(6,993)	(6,322)
Return of capital	308	0
Short-term investments, net	11,664	9,496
Securities receivable or payable, net	2,015	1,205
Purchases of property and equipment	(470)	(1,426)
Net cash used in investing activities	(43,732)	(66,058)
Financing activities
Dividends paid	(18,042)	(17,729)
Issuance of common shares under equity incentive plans	3,900	868
Common share repurchases	(1,874)	(3,953)
Other financing activities	(466)	(467)
Net cash used in financing activities	(16,482)	(21,281)
Change in cash and cash equivalents	103,872	(22,013)
Cash and cash equivalents at beginning of period	163,495	109,784
Cash and cash equivalents at end of period	267,367	87,771
Supplemental information
Interest paid	$ 5,368	$ 4,329