Debt and Capital Lease Obligations - Schedule of Long-term Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Revolving credit facility and term loan gross	[1]	$ 188,704	$ 207,322
Less unamortized debt issuance costs		(583)	(984)
Total debt		195,871	206,338
Capital lease obligations 4.3% weighted-average interest rate at September 30, 2018 and 3.8% at December 31, 2017, due through 2021		4,303	2,854
Total debt and capital lease obligations		200,174	209,192
Current portion	[2]	(155,756)	(152,599)
Long-term debt and capital lease obligations		44,418	$ 56,593
Brewster Inc. Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility and term loan gross	[1]	$ 7,750

[1] Represents the weighted-average interest rate in effect at the respective periods for the revolving credit facilities and term loan borrowings, including any applicable margin. The interest rates do not include amortization of debt issuance costs or commitment fees.

[2] Borrowings under the revolving credit facilities are classified as current because all borrowed amounts are due within one year.