Fair Value Measurements and Interest Rate Derivatives (Details)	3 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2011 item
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairments on long-lived assets	$ 0	$ 0
Goodwill impairment loss	0	$ 0
Assets:
Interest rate derivatives	1,000		$ 760,000
Liabilities:
Retirement benefit agreement	985,000		964,000
Total liabilities	7,065,000		1,401,000
Former Chairman
Liabilities:
Number of installments to be paid out under the Retirement Benefit Agreement | item				10
Amount paid under the Retirement Benefit Agreement	1,000,000		1,000,000
Interest Rate Swap
Liabilities:
Interest rate derivative liabilities	6,080,000		437,000
Level 2
Assets:
Life insurance policy	985,000		964,000
Total assets	986,000		1,724,000
Liabilities:
Retirement benefit agreement	985,000		964,000
Total liabilities	7,065,000		1,401,000
Level 2 | Interest Rate Cap
Assets:
Interest rate derivatives	1,000		1,000
Level 2 | Interest Rate Swap
Assets:
Interest rate derivatives			759,000
Liabilities:
Interest rate derivative liabilities	6,080,000		437,000
Total at the end of the period
Assets:
Life insurance policy	985,000		964,000
Total assets	986,000		1,724,000
Total at the end of the period | Interest Rate Cap
Assets:
Interest rate derivatives	$ 1,000		1,000
Total at the end of the period | Interest Rate Swap
Assets:
Interest rate derivatives			$ 759,000