Stockholders' Equity (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) director $ / shares shares	Mar. 31, 2019	Mar. 28, 2019 shares	Mar. 27, 2019 shares	Dec. 31, 2018 $ / shares shares	Dec. 31, 2017 $ / shares shares	Dec. 31, 2016 shares
Shares Activity [Line Items]
Common stock, shares authorized (in shares)	500,000,000				500,000,000	500,000,000
Common stock, par value per share (in dollars per share) | $ / shares	$ 0.001				$ 0.001	$ 0.001
Special stock shares issued (in shares)	100				100
Special stock par value per share (in shares) | $ / shares	$ 0.001				$ 0.001
Preferred stock, authorized (in shares)	100,000,000				100,000,000
Preferred stock, par value per share (in dollars per share) | $ / shares	$ 0.001				$ 0.001
Common shares, issued (in shares)	86,600,302				85,800,303
Preferred stock, issued (in shares)	0				0
Omnibus Employee Incentive Plan 2016
Shares Activity [Line Items]
Number of Shares Authorized (in shares)			1,500,000	500,000
2014 Independent Director Equity Plan
Shares Activity [Line Items]
Shares available for grant (in shares)	227,274
Fair Value of awards granted | $	$ 350,000
2014 Independent Director Equity Plan | Maximum
Shares Activity [Line Items]
Shares authorized under 2014 Independent Director Equity Plan (in shares)	300,000
2019 Long Term Incentive Plan
Shares Activity [Line Items]
Share-based payment award performance period	3 years
Special Stock | Macquarie Infrastructure Management (USA) Inc.
Shares Activity [Line Items]
Right to appoint number of directors | director	1
Restricted Stock Units (RSUs)
Shares Activity [Line Items]
Options, nonvested (in shares)	6,067				0
Period for recognition, cost not yet recognized	1 year 1 month 6 days
Restricted Stock Units (RSUs) | 2019 Short Term Incentive Plan
Shares Activity [Line Items]
Percentage of cash component incentive award		75.00%
Percentage of stock component incentive award		25.00%
Share-based payment award performance period	1 year
Award vesting period	2 years
Options, nonvested (in shares)	0
Performance Shares
Shares Activity [Line Items]
Options, nonvested (in shares)	125,194				0
Period for recognition, cost not yet recognized	2 years
Shares granted in period fair value at target | $	$ 5,000,000
Share-based payment arrangement, expense | $	1,000,000
Cost not yet recognized, amount | $	$ 4,000,000
Performance Shares | Minimum
Shares Activity [Line Items]
Options, nonvested (in shares)	0
Performance Shares | Maximum
Shares Activity [Line Items]
Options, nonvested (in shares)	230,566
Share-based Payment Arrangement, Tranche One | Restricted Stock Units (RSUs) | 2019 Short Term Incentive Plan
Shares Activity [Line Items]
Award vesting rights, percentage	50.00%
Share-based Payment Arrangement, Tranche Two | Restricted Stock Units (RSUs) | 2019 Short Term Incentive Plan
Shares Activity [Line Items]
Award vesting rights, percentage	50.00%
Special Stock
Shares Activity [Line Items]
Shares, outstanding	100				100	100	100