Debt and Short-Term Borrowings - Interest Rate Swaps (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Reclassified losses from accumulated other comprehensive income loss	$ 104,000
Other long-term assets	1,683,000	$ 214,000
Other long-term liabilities	4,059,000	$ 0
Reclassification from accumulated comprehensive loss over the next 12 months	1,000,000
2015 Interest Rate Swap Agreement
Derivative [Line Items]
Notional Amount	200,000,000
2018 Interest Rate Swap Agreement
Derivative [Line Items]
Notional Amount	$ 250,000,000
1-month LIBOR | 2015 Interest Rate Swap Agreement
Derivative [Line Items]
Fixed Rate	1.9225%
1-month LIBOR | 2018 Interest Rate Swap Agreement
Derivative [Line Items]
Fixed Rate	2.89%