Derivative Instruments (Interest Rate Swaps) (Details) - Interest Rate Swap [Member] - Interest Rate Swaps, Maturity Date, March 15, 2021, 2.415% [Member] - SunTrust [Member] - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 85,500
Pay rate	2.415%
Derivative liabilities	$ (3,139)	$ (2,644)