Stockholders' Equity - Common Stock Repurchase (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Apr. 25, 2017
Common Stock Repurchase
Shares repurchased (in dollars)		$ 959
Common Stock
Common Stock Repurchase
Number of shares authorized to be repurchased			$ 5,000
Shares repurchased (in shares)	73,466
Average price per share (in dollars per share)	$ 13.05
Shares repurchased (in dollars)	$ 959
Common stock available for repurchase	$ 4,041	$ 4,041