Fair Value Measurements (Overview of the Valuation Techniques and Significant Unobservable Inputs) (Details) $ in Thousands		6 Months Ended
		Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Values, Liabilities		$ 10,508	$ 2,160
Recurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Values, Liabilities	[1]	19,248	22,227
Recurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Values, Liabilities	[1]	$ 6,602	7,304
Recurring [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Time Until Resolution		24 months
Recurring [Member] | Level 3 [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Time Until Resolution		48 months
Recurring [Member] | Level 3 [Member] | Measurement Input, Conversion Rate [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Values, Liabilities		$ 6,602	$ 7,304
Recurring [Member] | Level 3 [Member] | Measurement Input, Conversion Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Values Utilized		1.62
Recurring [Member] | Level 3 [Member] | Measurement Input, Conversion Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Values Utilized		1.59
Recurring [Member] | Level 3 [Member] | Measurement Input, VISA Class A Appreciation [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Values Utilized		6
Recurring [Member] | Level 3 [Member] | Measurement Input, VISA Class A Appreciation [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Values Utilized		18

[1] For further disaggregation of derivative assets and liabilities, see Note 7 - Derivatives.