Derivatives Derivatives (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Derivative [Line Items]
Derivative, Amount of Hedged Item	$ 463,000
Interest Rate Cash Flow Hedge Asset at Fair Value	$ 6,856

Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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