|
Income Taxes Income Taxes (Details) - Unrecognized Tax Benefits (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Mar. 31, 2013
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Income Tax [Abstract] | |||
| Balance as of January 1, | $ 1,136 | $ 1,136 | $ 369 |
| Gross increase related to current period tax positions | 1,043 | 767 | |
| Gross decrease related to prior period tax positions | (143) | 0 | |
| Balance as of December 31, | $ 2,036 | $ 1,136 | |