Stock Based Compensation - Stock Options Transactions (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Option Shares [Abstract]
Outstanding at beginning of period (in shares)	110,947
Acquired in acquisition	43,086
Granted (in shares)	0
Exercised (in shares)	22,074
Forfeited (in shares)	0
Expired (in shares)	0
Outstanding at end of period (in shares)	131,959
Exercisable at end of period (in shares)	131,959
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 26.08
Business Combination Options Acquired (per share) | $ / shares	20.02
Granted (in dollars per share) | $ / shares	0.00
Exercised (in dollars per share) | $ / shares	18.06
Forfeited (in dollars per share) | $ / shares	0.00
Expired (in dollars per share) | $ / shares	0.00
Outstanding at end of period (in dollars per share) | $ / shares	25.44
Exercisable at end of period (in dollars per share) | $ / shares	$ 25.44
Weighted Average Remaining Contractual Term [Abstract]
Outstanding at end of period	1 year 7 months 28 days
Exercisable at end of period	1 year 7 months 28 days
Aggregate Intrinsic Value [Abstract]
Outstanding at end of period | $	$ 156
Exercisable at end of period | $	$ 156