Investments (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Realized pretax gains (losses) on the sale of investments
Gains	$ 5,560	$ 6,101	$ 32,013	$ 15,473
Losses	(655)	(1,478)	(6,862)	(2,280)
Net realized investment gain	4,905	4,623	25,151	13,193
Fixed Maturity Securities [Member]
Realized pretax gains (losses) on the sale of investments
Gains	4,135	635	6,150	4,139
Losses	(650)	(306)	(3,688)	(994)
Net realized investment gain	3,485	329	2,462	3,145
Others [Member]
Realized pretax gains (losses) on the sale of investments
Gains	0	817	0	5,345
Losses	0	0	0	0
Net realized investment gain	0	817	0	5,345
Equity Securities [Member]
Realized pretax gains (losses) on the sale of investments
Gains	1,425	4,649	25,863	5,989
Losses	(5)	(1,172)	(3,174)	(1,286)
Net realized investment gain	$ 1,420	$ 3,477	$ 22,689	$ 4,703