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Defined Contribution and 401(k) Plans (Details) (Retirement Savings Plan under Section 401 (k) [Member], USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Retirement Savings Plan under Section 401 (k) [Member] |  |  |  |
Additional Defined Contribution And 401(k) (Textual) [Abstract] |  |  |  |
Percentage of maximum limit for employees to contribute their cash compensation | 75.00% |  |  |
Percentage of employee compensation plus matching contribution | 100.00% |  |  |
Percentage of employee contribution | 3.00% |  |  |
Percentage of employers matching contribution | 50.00% |  |  |
Percentage of additional employee contribution | 2.00% |  |  |
Total plan expenses |  | $ 4.1 | $ 4.1 | $ 2.9

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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