Reinsurance (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Effects of reinsurance premium written and earned
Direct Written	$ 71,325		$ 168,990		$ 152,356	$ 162,150
Assumed Written	9,245		21,517		19,435	19,858
Ceded Written	(88)		(192)		(171)
Written total	80,482		190,315		171,620	182,008
Direct Earned	71,503		164,715		153,368	167,744
Assumed Earned	9,222		21,121		19,844	19,302
Ceded Earned	(88)		(192)		(171)
Earned total	$ 80,637	$ 86,454	$ 185,644	$ 167,224	$ 173,041	$ 187,046	$ 187,046