Financial Instruments - Notional Amounts (Details) (Interest rate swaps, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Interest rate swaps
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	$ 785	[1]	$ 723	[1]

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