Financial Statements (Parent Only) (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flow from operating activities:
Net loss before equity in earnings of subsidiaries	$ (737)	$ 7,428	$ 1,751	$ 5,507	$ (8,062)	$ 6,897	$ 3,533	$ 8,362	$ 13,949	$ 10,730	$ 27,869
Change in operating assets and liabilities:
Accrued investment income									(211)	(576)	869
Notes Receivable - other									5,875	(500)	20,437
Net cash provided by (used in) operating activities									34,212	61,908	59,646
Cash flow from investing activities:
Decrease (increase) in short term investments									16,532	(4,915)	(7,050)
Net cash provided by investing activities									(43,610)	(50,042)	(56,374)
Cash flow from financing activities:
Proceeds from stock									96	614	1,107
Stock repurchase payments									(168)	(289)	(148)
Net cash (used in) provided by financing activities									(13,859)	(6,692)	279
Net increase (decrease) in cash									(23,257)	5,174	3,551
Cash and cash equivalents, beginning of period				43,481				38,307	43,481	38,307	34,756
Cash and cash equivalents, end of period	20,224				43,481				20,224	43,481	38,307
Parent Company [Member]
Cash flow from operating activities:
Net loss before equity in earnings of subsidiaries									(3,542)	(2,148)	(2,373)
Change in operating assets and liabilities:
Accrued investment income									10	23	3
Due from/to affiliate											535
Accounts payable and accrued expenses									12,423	5,385	269
Notes Receivable - other									2,663		(70)
Net cash provided by (used in) operating activities									11,554	3,260	(1,636)
Cash flow from investing activities:
Decrease (increase) in investments									824	(1,103)	(642)
Investment in subsidiary									147	873	3,705
Decrease (increase) in short term investments									(945)	1,588	(1,532)
Net cash provided by investing activities									26	1,358	1,531
Cash flow from financing activities:
Proceeds from stock									2,155	2,932	3,030
Stock repurchase payments									(13,948)	(7,306)	(2,735)
Net cash (used in) provided by financing activities									(11,793)	(4,374)	295
Net increase (decrease) in cash									(213)	244	190
Cash and cash equivalents, beginning of period				550				306	550	306	116
Cash and cash equivalents, end of period	$ 337				$ 550				$ 337	$ 550	$ 306