Stockholders' Equity - Treasury Stock (Details) - USD ($)	1 Months Ended			3 Months Ended
	Mar. 31, 2016	Feb. 29, 2016	Jan. 31, 2015	Mar. 31, 2016	Jan. 31, 2016	Jan. 04, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Total Number of Shares Purchased (shares)	37,927	101,736	152,198	291,861
Average Price Paid Per Share (usd per share)	$ 16.44	$ 17.24	$ 16.53	$ 16.76
Approximate Dollar Value of Shares That May Yet Be Purchased Under the Publicly Announced Plans or Programs	$ 5,107,000	$ 5,730,000		$ 5,107,000	$ 7,484,000		$ 10,000,000
Common Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total Number of Shares Purchased (shares)	37,927	101,736	152,198	291,861
Stock repurchase authority						$ 10,000,000.0