Stockholders' Equity, Stock Repurchase Program and Treasury Stock (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Apr. 27, 2005
Stock Repurchase Program [Abstract]
Stock repurchase program, number of shares authorized to be repurchased (in shares)			2,000,000
Stock repurchase program, remaining number of shares authorized to be repurchased (in shares)		1,807,402
Treasury Stock [Abstract]
Shares repurchased to satisfy withholding tax obligations related to vested RSUs (in shares)	86,280
Aggregate costs of shares repurchased to satisfy withholding tax obligations related to vested RSUs	$ 72,000