Income Taxes - Narrative (Details) (USD $)	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2013 California	Jun. 30, 2013 Expiring June 30 2025	Jun. 30, 2013 Expiring June 30 2020	Jun. 30, 2013 Expiring June 30 2012	Jun. 30, 2013 General Business Tax Credit Carryforward [Member]	Jun. 30, 2013 Charitable Contribution Carryfoward [Member]
Income Tax Disclosure
Income tax expense	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (1,066,000)	$ 0	$ (14,053,000)	$ 0
Tax Benefit from Gain on Postretirement Benefits, Continuing Operations												1,100,000	0	14,100,000
Operating loss carryforwards																	114,400,000	112,700,000
Federal capital loss carryforward																			2,700,000
State capital loss carryforward																			1,200,000
Federal business tax credits																				800,000	2,200,000
Deferred tax assets				83,126,000								84,737,000	83,126,000	67,129,000
Deferred Tax Assets, Net of Valuation Allowance												(81,200,000)
Valuation allowance				(79,448,000)								(82,522,000)	(79,448,000)	(58,712,000)
Valuation allowance increase (decrease)												3,100,000	20,700,000	13,300,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate				3,100,000								3,100,000	3,100,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate, Next Twelve Months												0
Settlements												0	691,000	0		0
Income tax penalties and interest accrued on unrecognized tax benefits				10,000								0	10,000
Income tax penalties and interest expense on unrecognized tax benefits												$ (10,000)	$ (37,000)	$ 12,000