Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Benefit Plans Narrative Details
Company contribution match of employee contributions up to 3% of employee pre-tax contributions, percent	100.00%	100.00%	100.00%
Company contribution match of employee contributions of next 3% of employee pre-tax contributions, percent	50.00%	50.00%	50.00%
Matching contributions by company to 401(k) plan	$ 1,100,000	$ 620,000	$ 432,000