Auction Rate Securities (Tables)

3 Months Ended

Mar. 31, 2012

Auction Rate Securities [Abstract]

Failed ARS investments

			Other-than-
			temporary
	Original Cost		Impairment in			New Cost		Unrealized			Fair
	Basis		Retained Earnings			Basis		Gain/(Loss)			Value
Student loans	$	6,850	$	(179	)	$	6,671	$	(233	)	$	6,438
Closed end municipal funds		2,250		(18	)		2,232		(124	)		2,108
Credit linked notes		13,500		(8,765	)		4,735		2,935			7,670
Preferred stock		5,000		(5,000	)		—		—			—
Municipals		2,000		(83	)		1,917		(45	)		1,872
Total ARS	$	29,600	$	(14,045	)	$	15,555	$	2,533		$	18,088

			Other-than-
			temporary
	Original Cost		Impairment in			New Cost		Unrealized			Fair
	Basis		Retained Earnings			Basis		Gain/(Loss)			Value
Student loans	$	9,150	$	(242	)	$	8,908	$	(249	)	$	8,659
Closed end municipal funds		7,850		(54	)		7,796		(467	)		7,329
Credit linked notes		13,500		(8,765	)		4,735		3,291			8,026
Preferred stock		5,000		(5,000	)		—		—			—
Municipals		2,000		(83	)		1,917		(55	)		1,862
Total ARS	$	37,500	$	(14,144	)	$	23,356	$	2,520		$	25,876