Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of Diluted Shares
Denominator for Basic Earnings Per Share (in shares)	42,729,731	43,305,813	42,825,369	43,345,667
Dilutive Effect of Equity Based Awards (in shares)	213,229	212,536	207,830	212,997
Denominator for Diluted Earnings Per Share (in shares)	42,942,960	43,518,349	43,033,199	43,558,664
Antidilutive Stock Options and Restricted Stock Outstanding (in shares)	0	0	1,438	0