Shareholders’ Equity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2017 Vote $ / shares shares	Jun. 30, 2016 USD ($)	Dec. 31, 2016 $ / shares shares
Preferred Stock [Abstract]
Preferred stock, liquidation value (in dollars per share) | $ / shares	$ 0		$ 0
Preferred stock, shares outstanding (in shares) | shares	0		0
Stock Redeemed or Called During Period, Value | $		$ 5,800
Class A - Common stock
Common Stock [Abstract]
Number of vote for class of shares held	1
Class B - Common stock
Common Stock [Abstract]
Number of shares received after conversion, per share	1.15
Number of vote for class of shares held	10