401(k) Plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Defined Contribution Plan, Employer Matching Contribution, Minimum Number of Years of Employment	1 year
Maximum Annual Contribution Per Employee, Percent (Up to)	15.00%
Defined Benefit Plan, Employer Matching Contribution, Vesting Period	1 year
Employer Matching Contribution, Percent	6.00%
Defined Contribution Plan, Cost Recognized	$ 171	$ 138	$ 148