Goodwill and Other Intangibles - Net Lease Intangibles (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Acquired Finite Lived Intangible Assets Liabilities
Acquired finite-lived intangible asset, acquisition	$ 160,318
Below-market rent
Acquired Finite Lived Intangible Assets Liabilities
Acquired finite lived intangible liabilities weighted average useful life	20 years 1 month
Acquired finite-lived intangible liability, acquisition	$ (604)
In-place lease
Acquired Finite Lived Intangible Assets Liabilities
Acquired intangible assets weighted-average life	21 years 2 months 12 days
Acquired finite-lived intangible asset, acquisition	$ 124,742
Above-market rent
Acquired Finite Lived Intangible Assets Liabilities
Acquired intangible assets weighted-average life	20 years
Acquired finite-lived intangible asset, acquisition	$ 35,576