Derivative Financial Instruments - Fair Values of Derivative Financial Instruments in Condensed Consolidated Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Interest rate contracts - assets	$ 993
Interest rate contracts - liabilities	(3,122)
Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts - liabilities	(3,122)
Interest Rate Swap | Designated as Hedging Instrument | Other assets
Derivatives, Fair Value [Line Items]
Interest rate contracts - assets	993	2,244
Interest Rate Swap | Designated as Hedging Instrument | Other liabilities
Derivatives, Fair Value [Line Items]
Interest rate contracts - liabilities		$ (2,297)