Financial Instruments - Notional Amounts (Details) - Interest rate swaps - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Derivatives designated as cash flow hedges:
Derivative, Notional Amount		$ 75,000	$ 75,000
Interest Rate Derivative Assets, at Fair Value		0	0
Interest Rate Derivative Liabilities, at Fair Value	[1]	$ 235	$ 299

[1] (1) Balance recorded as other liabilities in Condensed Consolidated Balance Sheets