Note 8 - Derivative Instruments - Summary of Notional Amounts of Outstanding Derivative Positions (Details) - Jun. 30, 2019 ₱ in Thousands, $ in Thousands	PHP (₱)	USD ($)
Derivative, Notional Amount		$ 52,227,335
Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Philippine Foreign Exchange Contract [Member]
Derivative, Notional Amount	₱ 2,764,000,014	$ 52,227,335

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant