Investments and Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2011

Investments and Fair Value Measurements [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The amortized cost and fair value of available-for-sale investments at June 30, 2011 and December 31, 2010 were as follows:

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	( in thousands)
June 30, 2011
Current:
Auction rate student loan educational bonds	$	2,550	$	—	$	—	$	2,550
	$	2,550	$	—	$	—	$	2,550
Long-term:
Auction rate student loan educational bonds	$	67,575	$	—	$	3,081	$	64,494
	$	67,575	$	—	$	3,081	$	64,494
	$	70,125	$	—	$	3,081	$	67,044

December 31, 2010
Current:
Auction rate student loan educational bonds	$	8,300	$	—	$	—	8,300
	$	8,300	—		$	—	$	8,300
Long-term:
Auction rate student loan educational bonds	$	83,475	$	—	$	3,081	$	80,394
	$	83,475	—		$	3,081	$	80,394
	$	91,775	—		$	3,081	$	88,694

Investments Classified by Contractual Maturity Date [Table Text Block]

	Fair Value		Amortized Cost
Due within one year	$	2,550	$	2,550
Due after one year through five years	—		—
Due after five years through ten years	—		—
Due after ten years through May 1, 2040	64,494		67,575
	$	67,044	$	70,125

Schedule of Inputs Used in Securities Models [Table Text Block]

Inputs used in Company models of all securities held as of June 30, 2011 and December 31, 2010, excluding investments whose fair value is estimated to be par value as of the reporting period due to call notices being received by the Company were as follows:

	June 30, 2011	December 31, 2010
Average life of underlying loans	2-12 years	2-12 years
Rate of return	0.95-3.84%	1.28-4.12%
Discount rate	0.43-1.57%	0.53-1.85%
Liquidity discount rate	0.40-.75%	0.40-0.80%

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The table below presents a reconciliation for all assets and liabilities, measured at fair value, on a recurring basis using significant unobservable inputs (Level 3) during the three months ended June 30, 2011 and 2010.

Level 3 Fair Value Measurements	Available-for-sale debt securities
	(in thousands)
	2011			2010
Balance, January 1	$	88,694		$	147,419
Settlements	(21,650		)	(26,450		)
Purchases	—			—
Issuances	—			—
Sales	—			—
Transfers in to (out of) Level 3	—			—
Total gains or losses (realized/unrealized):
Included in earnings	—			—
Included in other comprehensive loss, net of tax	—			—
Balance, June 30,	$	67,044		$	120,969