Financial Information of Registrant (Parent Company) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Assets:
Investments, available-for-sale at fair value	$ 139,046	$ 172,825
Cash and cash equivalents	59,104	23,751	29,305	26,184	77,201
Other assets	6,190	6,986
TOTAL ASSETS	262,303	256,233
Liabilities:
Debentures payable	40,261	40,221
Other liabilities	14,897	13,383
Stockholders equity	72,793	82,729	122,228	177,190	159,856
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	262,303	256,233
Parent Company [Member]
Assets:
Investment in subsidiaries, at equity in net assets	108,663	109,189
Investments, available-for-sale at fair value		3,518
Cash and cash equivalents	3,344	8,445	11,674	9,534	3,058
Other assets	2,361	2,453
TOTAL ASSETS	114,368	123,605
Liabilities:
Debentures payable	40,261	40,221
Other liabilities	1,315	655
Stockholders equity	72,792	82,729
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 114,368	$ 123,605