| Financial Instruments | 3 Months Ended | 
|---|---|
| Mar. 31, 2019 | |
| Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] | |
| Financial Instruments | Financial Instruments Fair Value of Financial Instruments The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments: Accounts receivable and accounts payable: The carrying amounts reported in the balance sheet for accounts receivable and accounts payable approximate their fair value based on their short-term nature. Revolving credit facility: The Company’s revolving credit facility bears variable interest rates plus additional basis points based upon covenants related to total indebtedness to earnings.  As the revolving credit facility bears a variable interest rate, the carrying value approximates fair value. |