|
Commitments and Contingencies (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Operating Leases | |||
| Rental expense | $ 1,800,000 | $ 1,400,000 | $ 1,100,000 |
| Future minimum rental payments | |||
| 2015 | 1,971,000 | ||
| 2016 | 1,887,000 | ||
| 2017 | 1,655,000 | ||
| 2018 | 873,000 | ||
| Total | 6,386,000 | ||
| Purchase Commitments | |||
| Non-cancellable purchase commitments | $ 27,800,000 | ||
| Minimum | |||
| Operating Leases | |||
| Extension term of leases | 3 years | ||
| Maximum | |||
| Operating Leases | |||
| Extension term of leases | 5 years | ||