Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair value assets and liabilities measured on recurring basis

The following tables set forth our financial assets and liabilities as of December 31, 2018 and 2017 that we measured at fair value on a recurring basis by level within the fair value hierarchy. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to their fair value measurement.

	Fair Value as of December 31, 2018		Fair Value Measurements at December 31, 2018 Using Fair Value Hierarchy
			Level 1		Level 2		Level 3		Valuation Technique
Assets:
Cash and cash equivalents	$	152,719	$	152,719	$	—	$	—	Market
Restricted cash and cash equivalents	15,134		15,134		—		—		Market
Derivative assets	4,886		—		4,886		—		Market
Total	$	172,739	$	167,853	$	4,886	$	—

	Fair Value as of December 31, 2017		Fair Value Measurements at December 31, 2017 Using Fair Value Hierarchy
			Level 1		Level 2		Level 3		Valuation Technique
Assets:
Cash and cash equivalents	$	211,922	$	211,922	$	—	$	—	Market
Restricted cash and cash equivalents	21,935		21,935		—		—		Market
Derivative assets	3,254		—		3,254		—		Market
Total	$	237,111	$	233,857	$	3,254	$	—

Carrying amounts and fair values of financial instruments

The carrying amounts and fair values of our financial instruments at December 31, 2018 and 2017 are as follows:

	December 31, 2018				December 31, 2017
	Carrying Amount of Liability		Fair Value of Liability		Carrying Amount of Liability		Fair Value of Liability
Credit Facilities	$	425,000	$	425,000	$	175,000	$	175,000
Unsecured Term Loan	120,000		120,000		120,000		120,000
ECA Financings	189,080		190,216		227,491		232,030
Bank Financings	619,715		623,604		635,443		634,132
Senior Notes	3,450,000		3,446,826		3,200,000		3,367,245