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Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) Segment | Dec. 31, 2014 USD ($)
Significant Accounting Policies [Line Items] |  |
Remaining maturities of highly-liquid investments | three months or less |
Share based compensation arrangements requisite service period | 3 years |
Percent of shares vest on the third anniversary of the grant | 40.00% |
Percent of increments over the subsequent two anniversary dates | 30.00% |
Deferred income taxes | $ 50,137 | $ 52,582
Adjustments for New Accounting Principle, Early Adoption |  |
Significant Accounting Policies [Line Items] |  |
Deferred income taxes |  | $ 22,900
Liability Based Awards |  |
Significant Accounting Policies [Line Items] |  |
Share based compensation arrangements requisite service period | 3 years |
Other Restricted Stock |  |
Significant Accounting Policies [Line Items] |  |
Share based compensation arrangements requisite service period | 5 years |
Stock Options |  |
Significant Accounting Policies [Line Items] |  |
Share based compensation arrangements requisite service period | 5 years |
Minimum | Restricted Stock |  |
Significant Accounting Policies [Line Items] |  |
Share based compensation arrangements vesting period | 3 years |
Maximum | Restricted Stock |  |
Significant Accounting Policies [Line Items] |  |
Share based compensation arrangements vesting period | 5 years |
Building | Minimum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 15 years |
Building | Maximum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 40 years |
Equipment | Minimum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 3 years |
Equipment | Maximum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 12 years |
Computer Software, Development Costs | Minimum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 3 years |
Computer Software, Development Costs | Maximum |  |
Significant Accounting Policies [Line Items] |  |
Property, plant and equipment, useful life | 10 years |
Travel & Recreation Group |  |
Significant Accounting Policies [Line Items] |  |
Number of business lines | Segment | 4 |

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