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Derivatives - Interest Rate Swap (Details) (USD $) | 12 Months Ended |  |  |
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Dec. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 19, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |
Derivative, Fixed Interest Rate |  |  |  | 0.9825%
Interest rate swap |  | $ (1,200,000) | $ (700,000) |
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax |  | 468,000 | 1,788,000 |
Notional Amount of Interest Rate Cash Flow Hedge Derivatives | 55,000,000 |  |  | 150,000,000
Derivative, Cash Received on Hedge | $ 28,000 |  |  |

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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