Related Party Transactions and Arrangements (Due To Affiliates) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Due to affiliates	$ 559	$ 103,434
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Due to affiliates	559	103,434
Affiliated Entity [Member] | Offering Related Costs [Member]
Related Party Transaction [Line Items]
Due to affiliates	0	220
Affiliated Entity [Member] | Merger And Other Non-Routine Transactions [Member]
Related Party Transaction [Line Items]
Due to affiliates	0	38,645
Affiliated Entity [Member] | Other [Member]
Related Party Transaction [Line Items]
Due to affiliates	559	0
Affiliated Entity [Member] | Management Fees To Affiliates [Member]
Related Party Transaction [Line Items]
Due to affiliates	0	4,969
Affiliated Entity [Member] | General and Administrative [Member]
Related Party Transaction [Line Items]
Due to affiliates	$ 0	$ 59,600