Income Taxes (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2012	Dec. 31, 2015
Income Tax Examination [Line Items]
Upper bound of decrease in unrecognized tax benefit that is reasonably possible	$ 2,000,000
Unrecognized Tax Benefits [Abstract]
Unrecognized tax benefit — Permanent tax positions	300,000			$ 200,000
Unrecognized tax benefit — Temporary tax positions	4,300,000			4,300,000
Total unrecognized tax benefit	4,600,000			4,500,000
NOL and tax credit carryforwards	(1,000,000)			(900,000)
Amounts accrued for penalties related to unrecognized tax benefits	0			$ 0
Internal Revenue Service (IRS)
Tax Audits [Abstract]
Year(s) under examination		2012 and 2013	2010 and 2011
Year of carryback claim under examination			2009
Potential Tax Adjustments	$ 14,000,000
State Jurisdiction (Wisconsin)
Tax Audits [Abstract]
Earliest year subject to examination	2011