Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

Name:	us-gaap_DeferredIncomeTaxAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

New Accounting Pronouncements - Narrative (Details) - USD ($) $ in Thousands	Jul. 01, 2018	Dec. 31, 2017	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax deferred charge		$ (36,668)	$ (36,057)
Scenario, Forecast \| Accounting Standard Update 2016-16, Year 2018 Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax deferred charge	$ 57,000