Summary of Significant Accounting Policies (Additional Information 2) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) segment entity	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Aggregate allowance for doubtful accounts	$ 3,800	$ 11,500
Capital lease obligations	$ 2,700	$ 7,800
Lease financing obligation	qts:CapitalLeaseLeaseFinancingObligationsAndMortgageNotesPayable	qts:CapitalLeaseLeaseFinancingObligationsAndMortgageNotesPayable
Net book value of assets associated with leases	$ 1,800	$ 14,700
Number of operating segments | segment	1
Number of reportable segments | segment	1
Valuation allowance	$ 8,361	713	$ 393
Required minimum quarterly distribution of available cash	100
Net operating loss carry forwards related to Federal income taxes	$ 33,400
Net operating loss carry forwards related to State income taxes	66,300
Net operating loss carryforwards no expiration period	32,600
Interest expense carryforward with no expiration	8,800
Unrecognized Tax Benefits	0	0	0
Interest and penalties related to income taxes	$ 0	0	$ 0
Number of subsidiaries taxed as taxable REIT | entity	2
Valuation allowance change	$ 7,700
Statutory rate	21.00%
One-time non-cash income tax benefit of $3.3 million to reflect the re-measurement of deferred tax assets (liabilities)		$ 3,300
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 300
Minimum | Federal [Member]
Summary Of Significant Accounting Policies [Line Items]
Net operating loss carry forwards, expiration period	11 years
Minimum | State [Member]
Summary Of Significant Accounting Policies [Line Items]
Net operating loss carry forwards, expiration period	2 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Statutory rate		35.00%
Maximum | Federal [Member]
Summary Of Significant Accounting Policies [Line Items]
Net operating loss carry forwards, expiration period	18 years
Maximum | State [Member]
Summary Of Significant Accounting Policies [Line Items]
Net operating loss carry forwards, expiration period	20 years
Customer One | Rental Revenue | Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of total revenue	12.80%
Two Customers [Member] | Accounts Receivable | Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	5.00%
Two Customers [Member] | Accounts Receivable | Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	25.00%
Both Customers [Member] | Accounts Receivable | Minimum
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	10.00%
No Other Customers | Rental Revenue | Maximum
Summary Of Significant Accounting Policies [Line Items]
Percentage of total revenue	5.00%