Summary of Significant Accounting Policies (Additional Information 2) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2015 USD ($) segment	Dec. 31, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Capital lease obligations	$ 32,300	$ 13,100
Lease financing obligations	$ 23,900
Number of operating segments \| segment	1
Number of reportable segments \| segment	1
Financial assets	$ 0	0
Financial liability	0	0
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Aggregate allowance for doubtful accounts	$ 5,200	$ 3,700
Customer One [Member] \| Rental Revenue [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of total revenue	7.30%
Customer Two [Member] \| Accounts Receivable [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	10.00%
Three Customers [Member] \| Accounts Receivable [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	5.00%
Other Customers [Member] \| Rental Revenue [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of total revenue	5.00%
Five Customers [Member] \| Accounts Receivable [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of total accounts receivable	36.00%
Carpathia Hosting, Inc. [Member]
Summary Of Significant Accounting Policies [Line Items]
Lease financing obligations	$ 2,600

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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The liability due as of the balance sheet date for leasebacks accounted for using the deposit method.

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