Line-of-Credit and Long-term Debt - Line of Credit (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2013	Dec. 31, 2013
Line of Credit Facility [Line Items]
Interest rate swap, fixed rate	4.11%
Commitment fee percentage	0.01%
Face amount		$ 4,750,000
Stated percentage		4.25%
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
Line of credit outstanding balance	6,850,000		0
Minimum tangible net worth required			225,000,000
Liquid assets	20,000,000		$ 25,000,000
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%