Long-term Debt and Line of Credit - Provisions of the Revolving Line of Credit and Accordion (Details) - USD ($)	2 Months Ended	3 Months Ended	12 Months Ended
	Mar. 11, 2016	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Aug. 05, 2015
Debt Instrument [Line Items]
Repayments of debt			$ 42,955,000	$ 1,557,000	$ 4,057,000
Proceeds from lines of credit			149,021,000	$ 30,000,000	$ 0
Line of Credit
Debt Instrument [Line Items]
Stated interest rate						4.75%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, amount outstanding		$ 4,000,000	4,000,000
Remaining borrowing capacity		44,900,000	$ 44,900,000
Repayments of debt		$ 10,000,000
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 50,000,000
Minimum additional borrowing amount						1,000,000
Amount over minimum additional borrowing amount, integral multiples						250,000
Stated interest rate		3.44%	3.44%
Revolving Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						20,000,000
Letters of credit outstanding		$ 1,100,000	$ 1,100,000
Revolving Credit Facility | Bridge Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						5,000,000
Minimum additional borrowing amount						250,000
Amount over minimum additional borrowing amount, integral multiples						$ 50,000
Subsequent Event [Member] | Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from lines of credit	$ 22,000,000