Long-term Debt and Line of Credit - Provisions of Revolving Line of Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Letters of credit outstanding	$ 1,700
Repayments of debt	49,120	$ 48,204	$ 70,210
Proceeds from lines of credit	53,000	$ 10,000	$ 63,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	50,000
Minimum borrowing increment amount	1,000
Increment borrowing multiple for amounts borrowed in excess of minimum borrowing amount	250
Amount outstanding	39,000
Remaining borrowing capacity	9,300
Repayments of debt	19,000
Increase in debt balance	34,000
Proceeds from lines of credit	53,000
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	20,000
Bridge Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	5,000
Minimum borrowing increment amount	250
Increment borrowing multiple for amounts borrowed in excess of minimum borrowing amount	$ 50