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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 01, 2012
Operating Leases, Rent, Net [Abstract] |  |  |  |  |
Operating lease expense |  | $ 9,826,000 | $ 11,544,000 | $ 11,787,000 |
Sublease income |  | 531,000 | 671,000 | 770,000 |
Net expense |  | 9,295,000 | 10,873,000 | 11,017,000 |
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |
Operating Leases, Lease Commitments Due in 2014 |  | 6,901,000 |  |  |
Operating Leases, Lease Commitments Due in 2015 |  | 2,781,000 |  |  |
Operating Leases, Lease Commitments Due in 2016 |  | 2,035,000 |  |  |
Operating Leases, Lease Commitments Due in 2017 |  | 1,458,000 |  |  |
Operating Leases, Lease Commitments Due in 2018 |  | 315,000 |  |  |
Operating Leases, Lease Commitments Due Thereafter |  | 0 |  |  |
Operating Leases, Lease Commitments Due Total |  | 13,490,000 |  |  |
Operating Leases, Future Minimum Payments Receivable [Abstract] |  |  |  |  |
Operating Leases, Sublease Income Due in 2014 |  | 967,000 |  |  |
Operating Leases, Sublease Income Due in 2015 |  | 206,000 |  |  |
Operating Leases, Sublease Income Due in 2016 |  | 0 |  |  |
Operating Leases, Sublease Income Due in 2017 |  | 0 |  |  |
Operating Leases, Sublease Income Due in 2018 |  | 0 |  |  |
Operating Leases, Sublease Income Due Thereafter |  | 0 |  |  |
Operating Leases, Sublease Income Due Total |  | 1,173,000 |  |  |
Operating Leases, Future Minimum Payments, Net Commitments [Abstract] |  |  |  |  |
Operating Leases, Net Commitments Due in 2014 |  | 5,934,000 |  |  |
Operating Leases, Net Commitments Due in 2015 |  | 2,575,000 |  |  |
Operating Leases, Net Commitments Due in 2016 |  | 2,035,000 |  |  |
Operating Leases, Net Commitments Due in 2017 |  | 1,458,000 |  |  |
Operating Leases, Net Commitments Due in 2018 |  | 315,000 |  |  |
Operating Leases, Net Commitments Due Thereafter |  | 0 |  |  |
Operating Leases, Net Commitments Due Total |  | 12,317,000 |  |  |
Capital Leases, Lease Commitments [Abstract] |  |  |  |  |
Capital Leases, Lease Commitments Due in 2014 |  | 3,868,000 |  |  |
Capital Leases, Lease Commitments Due in 2015 |  | 3,985,000 |  |  |
Capital Leases, Lease Commitments Due in 2016 |  | 4,104,000 |  |  |
Capital Leases, Lease Commitments Due in 2017 |  | 4,221,000 |  |  |
Capital Leases, Lease Commitments Due in 2018 |  | 4,336,000 |  |  |
Capital Leases, Lease Commitments Due Thereafter |  | 40,903,000 |  |  |
Capital Leases, Lease Commitments, Total |  | 61,417,000 |  |  |
Capitalization of Construction Costs |  |  |  |  | 27,300,000
Long term Construction Costs Liability |  |  |  |  | $ 27,300,000
Contingencies [Abstract] |  |  |  |  |
Number of subcontractors that operated the facility | 1 |  |  |  |
Number of deaths of subcontractor employees | 5 |  |  |  |
Building Facilities [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 15 years |  |  |
Operating Leases [Member] | Minimum [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 2 years |  |  |
Operating Leases [Member] | Maximum [Member] |  |  |  |  |
Lease Obligations [Line Items] |  |  |  |  |
Term of Lease |  | 15 years |  |  |

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