Line-of-Credit and Long-term Debt - Additional Information (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 13, 2014 USD ($)	Sep. 30, 2013 USD ($)
Line of Credit Facility [Line Items]
Interest rate swap, fixed rate	4.11%
Long-term debt	$ 73,866,000
Promissory Note
Line of Credit Facility [Line Items]
Face amount				$ 4,750,000
Stated percentage				4.25%
Monthly principal and interest payments	102,700
Long-term debt	$ 3,961,000
Term loan
Line of Credit Facility [Line Items]
Line of credit amount			$ 70,000,000
Interest only payment period	2 years
Term loan | Selected LIBOR rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.17%
Revolving line of credit
Line of Credit Facility [Line Items]
Line of credit amount			$ 30,000,000
Commitment fee percentage	0.01%
Line of credit outstanding balance	$ 7,700,000	$ 0
Liquid assets	$ 20,000,000
Revolving line of credit | Maximum
Line of Credit Facility [Line Items]
Total liabilities divided by tangible net worth, not greater than	0.75
Revolving line of credit | Minimum
Line of Credit Facility [Line Items]
Debt service coverage ratio, not less than	1.25
Revolving line of credit | Selected LIBOR rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%
Revolving line of credit | LIBOR for a fixed rate term
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%