Shares and Stockholders' Equity (Narrative) (Details) (Common stock warrant [Member])	12 Months Ended
	Dec. 31, 2014
Common stock warrant [Member]
Outstanding warrant to purchase common stock (in shares)	2,441,742
Exercise price of warrant (in dollars per share)	10.45
Warrant expiration date LNC deferred compensation plans	Jul. 10, 2019