Stockholders' Equity and Stock Based Compensation - Treasury Stock (Details) - USD ($)	1 Months Ended						6 Months Ended
	Jun. 30, 2016	May 30, 2016	Apr. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Jan. 31, 2015	Jun. 30, 2016	Jan. 31, 2016	Jan. 04, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Total Number of Shares Purchased (shares)	0	34,323	31,468	37,927	101,736	152,198	357,652
Average Price Paid Per Share (usd per share)	$ 0.00	$ 16.37	$ 16.40	$ 16.44	$ 17.24	$ 16.53	$ 16.69
Approximate Dollar Value of Shares That May Yet Be Purchased Under the Publicly Announced Plans or Programs	$ 4,029,000	$ 4,029,000	$ 4,591,000	$ 5,107,000	$ 5,730,000		$ 4,029,000	$ 7,484,000		$ 10,000,000
Common Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total Number of Shares Purchased (shares)	0	34,323	31,468	37,927	101,736	152,198	357,652
Stock repurchase authority									$ 10,000,000.0