Stock Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Options - Outstanding, Beginning Balance (in shares)	76,750
Options - Granted (in shares)	0
Options - Exercised (in shares)	(250)
Options - Forfeited (in shares)	0
Options - Outstanding, Ending Balance (in shares)	76,500	76,750
Options - Exercisable (in shares)	76,500
Weighted-Average Exercise Price - Outstanding, Beginning Balance (in dollars per share)	$ 25.16
Weighted-Average Exercise Price - Granted (in dollars per share)	$ 0
Weighted-Average Exercise Price - Exercised (in dollars per share)	$ 15.06
Weighted-Average Exercise Price - Forfeited (in dollars per share)	$ 0
Weighted-Average Exercise Price - Outstanding, Ending Balance (in dollars per share)	$ 25.19	$ 25.16
Weighted-Average Exercise Price - Exercisable (in dollars per share)	$ 25.19
Aggregate Intrinsic Value - Outstanding, Beginning Balance	$ 0
Aggregate Intrinsic Value - Granted	0
Aggregate Intrinsic Value - Exercised	0
Aggregate Intrinsic Value - Forfeited	0
Aggregate Intrinsic Value - Outstanding, Ending Balance	53,185	0
Aggregate Intrinsic Value - Exercisable	$ 53,185
Weighted-Average Remaining Term - Outstanding (in years)	2 years 6 months	2 years 8 months 12 days
Weighted-Average Remaining Term - Granted (in years)	0 years
Weighted-Average Remaining Term - Exercised (in years)	0 years
Weighted-Average Remaining Term - Forfeited (in years)	0 years
Weighted-Average Remaining Term - Exercisable (in years)	2 years 6 months