Derivative Financial Instruments - Interest Rate Swap Level 4 Amounts in AOCI (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in AOCI on the derivative-effective portion	$ 277	$ (1,007)	$ (3,601)
Loss reclassified from AOCI into income-effective portion	1,132	270
Estimated loss to be reclassified to earnings from AOCI during the next 12 months	1,122
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swap - notional value	35,000	35,000
Variable rate of the interest rate swap	0.24%	0.31%
Fixed rate of the interest rate swap	3.47%	3.47%
Loss reclassified from AOCI into income-effective portion	1,132	270	0
Gain (loss) recognized in income on the derivative-ineffective portion	0	0	0
Accrued expenses, accounts payable and other liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Balance Sheet Location	Accrued expenses, accounts payable and other liabilities
Accrued expenses, accounts payable and other liabilities [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of the Swap	2,930	4,338
Accumulated Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Balance Sheet Location	AOCI
Accumulated Other Comprehensive Income (Loss) [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss, net of tax, on the fair value of the Swap	$ 1,904	$ 2,820