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Income Taxes (Details 4) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Reconciliation of the beginning and ending liabilities for unrecognized tax benefits |  |  |
Balance at beginning of period | $ 655,000 | $ 567,000 |
Gross increases in current period tax positions | 132,000 | 186,000 |
Gross increases in prior period tax positions | 55,000 | 134,000 |
Gross decreases in prior period tax positions | (185,000) | (232,000) |
Balance at end of period | 657,000 | 655,000 | 567,000
Accrued interest and penalties at end of period | 189,000 | 185,000 |
Total liability for unrecognized tax benefits | 846,000 | 840,000 |
Unrecognized tax benefits |  |  |
Interest and penalties charged to income tax expense as a result of the unrecognized tax benefits | $ 0 | $ 200,000 | $ 100,000

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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