Stock Based Compensation - Stock Options Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Jan. 01, 2015	Jun. 30, 2015
Option Shares [Abstract]
Outstanding at beginning of period (in shares)	110,947	110,947
Acquired in acquisition	43,086	43,086
Granted (in shares)		0
Exercised (in shares)		14,642
Forfeited (in shares)		0
Expired (in shares)		0
Outstanding at end of period (in shares)		139,391
Exercisable at end of period (in shares)		139,391
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 26.08	$ 26.08
Business Combination Options Acquired (per share)		20.02
Granted (in dollars per share)		0.00
Exercised (in dollars per share)		18.07
Forfeited (in dollars per share)		0.00
Expired (in dollars per share)		0.00
Outstanding at end of period (in dollars per share)		25.05
Exercisable at end of period (in dollars per share)		$ 25.05
Weighted Average Remaining Contractual Term [Abstract]
Outstanding at end of period		1 year 10 months 21 days
Exercisable at end of period		1 year 10 months 21 days
Aggregate Intrinsic Value [Abstract]
Outstanding at end of period		$ 219
Exercisable at end of period		$ 219