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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Advertising Costs | Advertising costs for the years ended December 31, 2014, 2013 and 2012, are reflected in the following table (in thousands):
|  | Years Ended December 31,
|  | 2014 |  | 2013 |  | 2012
Advertising Costs |  | $ | 42,335 |  |  | $ | 38,845 |  |  | $ | 42,256 |
Depreciation Expense Computed Using Straight-Line Method over Useful Lives | Depreciation expense is computed using the straight-line method over the following useful lives:
Computer hardware | 2 to 3 years
Computer software | 2 to 5 years
Furniture and equipment | 5 years
Leasehold improvements | Term of lease, 5 years maximum
Internal-Use Software Development Costs Capitalized | Internal-use software development costs capitalized for the years ended December 31, 2014, 2013 and 2012, are reflected in the following table (in thousands):
|  | Years Ended December 31,
|  | 2014 |  | 2013 |  | 2012
Internal-use software development costs |  | $ | 24,367 |  |  | $ | 13,027 |  |  | $ | 19,083 |

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