Income Taxes (Details) (USD $)			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Internal Revenue Service (IRS)	Sep. 30, 2012 Internal Revenue Service (IRS)	Mar. 31, 2014 State Jurisdiction (Wisconsin)
Tax Audits [Abstract]
Year(s) no longer subject to audit as statute of limitations has expired			2008
Earliest year subject to examination			2009		2009
Year(s) under examination				2010 and 2011
Tax Adjustments, Settlements, and Unusual Provisions			$ 10,000,000
Tax year(s) for which income tax examination has been completed					2009 through 2011
Unrecognized Tax Benefits [Abstract]
Unrecognized tax benefit — Permanent tax positions	100,000	100,000
Unrecognized tax benefit — Temporary tax positions	1,600,000	1,400,000
Total unrecognized tax benefit	1,700,000	1,500,000
NOL and tax credit carryforwards	(400,000)	(400,000)
Amounts accrued for penalties related to unrecognized tax benefits	$ 0	$ 0