Income Tax Expense (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Partnership	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) Partnership
Income Tax Expense [Abstract]
Investments in number of partnerships | Partnership			4		4
Investment amount in partnerships	$ 765,000		$ 765,000		$ 959,000
Investment Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Investment tax credits	895,000		$ 895,000
Tax credits recognition period			6 years 3 months
Tax credits recognized as reduction of tax expense amount	$ 50,000	$ 50,000	$ 149,000	$ 149,000