Amount of short-term and long-term debt and lease obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Name:	us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - Summary of Senior Unsecured Credit Facility (Details) - Unsecured revolving credit facility $ in Thousands, ¥ in Billions	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 JPY (¥)	Dec. 31, 2018 USD ($)
Senior Unsecured Credit Facility
Debt	$ 22,410		$ 91,563
JPY
Senior Unsecured Credit Facility
Debt	$ 22,410	¥ 2.4	22,290
JPY \| JPY LIBOR
Senior Unsecured Credit Facility
Variable interest rate (percentage)	1.00%
EUR
Senior Unsecured Credit Facility
Debt	$ 0		$ 69,273