Debt and Capital Lease Obligations - Schedule of Long-term Debt and Capital Lease Obligations (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Interest rate on credit facility	3.10%	2.60%
Weighted interest rate on long term debt	3.80%	4.90%
Current revolving credit facility maturity period	1 year	1 year
Brewster Inc. Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate on credit facility		2.70%