Benefit Plans Restricted Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Weighted Average Grant-Date Fair Value per share
Compensation expense	$ 905,000	$ 514,000	$ 943,000
Restricted Stock
Shares
Unvested at the beginning of the year (in shares)	60,000	0		60,000
Granted (in shares)	60,000
Vested (in shares)	0
Unvested at the end of the year (in shares)	60,000	0
Weighted Average Grant-Date Fair Value per share
Unvested at the beginning of the year (in dollars per share)	$ 15.46	$ 0.00		$ 15.46
Granted (in dollars per share)	15.46
Vested (in dollars per share)	0.00
Unvested at the end of the year (in dollars per share)	$ 15.46	$ 0.00
Compensation expense	$ 260,000
Grant date fair value	$ 927,500
Unrecognized compensation expense				$ 689,000