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Derivative Instruments (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | |||||
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Jun. 30, 2013
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Jun. 30, 2013
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Jun. 30, 2012
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Dec. 31, 2012
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Dec. 31, 2011
Interest Rate Swap [Member]
interest_rate_derivative_held
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Jun. 30, 2012
Maximum [Member]
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Dec. 31, 2011
Interest Rate Swap Agreement 1 [Member]
Interest Rate Swap [Member]
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Dec. 31, 2011
Interest Rate Swap Agreement 2 [Member]
Interest Rate Swap [Member]
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| Derivative [Line Items] | ||||||||
| Number of interest rate swaps held | 2 | |||||||
| Fixed interest rate | 1.67% | 1.83% | ||||||
| Notional amount of interest rate derivatives | $ 31,800,000 | |||||||
| Fair value of derivative liabilities | 800,000 | 800,000 | 1,000,000 | |||||
| Derivative Instruments, Gain Recognized in Income | 100,000 | 300,000 | ||||||
| Recognized losses less than amount | $ 100,000 | $ 100,000 | ||||||
| X | ||||||||||
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- Definition
Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fixed interest rate related to the interest rate derivative. No definition available.
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- Definition
The amount of gain recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of loss recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of interest rate derivative instruments held by the entity at the reporting date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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