Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net cash provided by operating activities	$ 48,461	$ 16,112
Securities available-for-sale:
Purchases – fixed maturity securities	(118,652)	(46,276)
Sales – fixed maturity securities	26,392	32,148
Maturities and calls – fixed maturity securities	45,245	15,406
Purchases – equity securities	(5,949)	0
Sales – equity securities	766	409
Bank loan participations:
Purchases	(66,059)	(75,983)
Sales	35,708	37,462
Maturities	11,427	18,840
Other invested assets:
Purchases	(4,992)	(250)
Short-term investments, net	10,569	(2,517)
Securities receivable or payable, net	12,576	(336)
Purchases of property and equipment	(275)	(970)
Net cash used in investing activities	(53,244)	(22,067)
Financing activities
Dividends paid	(9,074)	(8,885)
Issuance of common shares under equity incentive plans	2,862	303
Common share repurchases	(1,283)	(732)
Repayments of financing obligations net of proceeds	(171)	(291)
Net cash used in financing activities	(7,666)	(9,605)
Change in cash and cash equivalents	(12,449)	(15,560)
Cash and cash equivalents at beginning of period	163,495	109,784
Cash and cash equivalents at end of period	151,046	94,224
Supplemental information
Interest paid	$ 2,509	$ 2,101