Discontinued Operations (Details) (USD $)	3 Months Ended			6 Months Ended		0 Months Ended
	Dec. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jan. 02, 2015	Apr. 17, 2015	Dec. 10, 2014	Sep. 30, 2014	Oct. 22, 2014	Apr. 16, 2015
Spain And Netherlands
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other income	$ 700,000
Photovoltaics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill		0		0					20,384,000
Other income		0	0	779,000	0
Digital Products Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price										17,500,000
Transaction costs incurred in sale of business		1,600,000
Other income		0	0	0	0
Asset sale, cash consideration						1,500,000
Asset sale, promissory note, principal amount										16,000,000
Proceeds from sale of business				1,500,000	0
Asset sale, promissory note, interest rate, year one										0.05
Asset sale, promissory note, interest rate, year two										0.13
Net assets sold during the period		13,300,000		13,300,000
Gain (loss) on disposal of discontinued operation, net of tax		2,000,000
Digital Products Business | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset sale, promissory note, principal amount											15,500,000
Proceeds from sale of business							15,700,000
Photovoltaics | Photovoltaics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price								150,000,000
Net assets sold								60,300,000
Transaction costs incurred in sale of business								2,700,000
Gain on sale of Photovoltaics Business	$ 56,800,000