Fair Value Disclosure (Details) - Fair value measurements, recurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Assets:
Assets at fair value	$ 767	$ 0	$ 715
Liabilities:
Liabilities at fair value	1,180	390	34
Prepaid expenses and other current assets
Assets:
Interest rate swap agreements	0	0	236
Foreign currency exchange contracts	767	0	44
Other non-current assets
Assets:
Interest rate swap agreements	0	0	435
Other current liabilities
Liabilities:
Interest rate swap agreements	362	21	0
Foreign currency exchange contracts	0	308	34
Other long-term liabilities
Liabilities:
Interest rate swap agreements	$ 818	$ 61	$ 0