Reinsurance (Reinsurance Recoverables) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Components of reinsurance recoverables
Reinsurance recoverable on paid losses	$ 92,897	$ 99,937
Reinsurance recoverable on outstanding losses	439,252	443,059
Reinsurance recoverable on incurred but not reported losses	634,562	627,404
Reserve for uncollectible reinsurance	(1,500)	(1,500)
Total reinsurance recoverables	$ 1,165,211	$ 1,168,900