Fair Value Measurements and Interest Rate Derivatives (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2011 item
Fair value of assets and liabilities measured at fair value on a recurring and non-recurring basis
Impairments on long-lived assets	$ 0	$ 0	$ 0	$ 0
Goodwill	990,000		990,000		$ 990,000
Goodwill impairment loss	0	$ 0	0	$ 0
Assets:
Interest rate derivatives					760,000
Former Chairman
Liabilities:
Number of installments to be paid out under the Retirement Benefit Agreement | item						10
Total amount paid to date under the Retirement Benefit Agreement	1,200,000		1,200,000
Level 2
Assets:
Life insurance policy	857,000		857,000		964,000
Total assets	857,000		857,000		1,724,000
Liabilities:
Interest rate derivative liabilities	7,487,000		7,487,000		437,000
Retirement benefit agreement	857,000		857,000		964,000
Total liabilities	8,344,000		8,344,000		1,401,000
Level 2 | Interest Rate Cap
Assets:
Interest rate derivatives					1,000
Level 2 | Interest Rate Swap
Assets:
Interest rate derivatives					759,000
Total at the end of the period
Assets:
Life insurance policy	857,000		857,000		964,000
Total assets	857,000		857,000		1,724,000
Liabilities:
Interest rate derivative liabilities	7,487,000		7,487,000		437,000
Retirement benefit agreement	857,000		857,000		964,000
Total liabilities	$ 8,344,000		$ 8,344,000		1,401,000
Total at the end of the period | Interest Rate Cap
Assets:
Interest rate derivatives					1,000
Total at the end of the period | Interest Rate Swap
Assets:
Interest rate derivatives					$ 759,000