Financing Activity - Applicable Credit Spread Over Libor at Various Leverage Levels (Details)	9 Months Ended
	Sep. 30, 2020
Less than 0.450 to 1.00
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.450
Less than 0.450 to 1.00 | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	1.20%
Less than 0.450 to 1.00 | LIBOR | Term Loans
Debt Instrument [Line Items]
Applicable Margin	1.35%
Less than 0.450 to 1.00 | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	0.20%
Less than 0.450 to 1.00 | Base Rate | Term Loans
Debt Instrument [Line Items]
Applicable Margin	0.35%
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | Minimum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.450
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | Maximum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.500
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	1.25%
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | LIBOR | Term Loans
Debt Instrument [Line Items]
Applicable Margin	1.45%
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	0.25%
Equal to or greater than 0.450 to 1.00 but less than 0.500 to 1.00 | Base Rate | Term Loans
Debt Instrument [Line Items]
Applicable Margin	0.45%
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | Minimum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.500
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | Maximum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.550
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	1.30%
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | LIBOR | Term Loans
Debt Instrument [Line Items]
Applicable Margin	1.60%
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	0.30%
Equal to or greater than 0.500 to 1.00 but less than 0.550 to 1.00 | Base Rate | Term Loans
Debt Instrument [Line Items]
Applicable Margin	0.60%
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | Minimum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.550
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | Maximum
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.600
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	1.55%
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | LIBOR | Term Loans
Debt Instrument [Line Items]
Applicable Margin	1.90%
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	0.55%
Equal to or greater than 0.550 to but less than 0.600 to 1.000 | Base Rate | Term Loans
Debt Instrument [Line Items]
Applicable Margin	0.90%
Equal to or greater than 0.600 to 1.000
Debt Instrument [Line Items]
Total liabilities to gross asset value, ratio	0.600
Equal to or greater than 0.600 to 1.000 | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	1.90%
Equal to or greater than 0.600 to 1.000 | LIBOR | Term Loans
Debt Instrument [Line Items]
Applicable Margin	2.25%
Equal to or greater than 0.600 to 1.000 | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Applicable Margin	0.90%
Equal to or greater than 0.600 to 1.000 | Base Rate | Term Loans
Debt Instrument [Line Items]
Applicable Margin	1.25%