Revised Financial Statements (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Out-of-period adjustment, net affect on after-tax income	$ 7,500,000
Retained earnings	1,282,465,000	1,283,549,000
Out-of-period adjustment net affect on diluted earnings per share (in dollars per share)		$ 0.03	$ 0.06	$ 0.06
Revision
Retained earnings		$ (6,659,000)