Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended	3 Months Ended			3 Months Ended				0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Sep. 03, 2013 Merger Agreement [Member] Rate	Mar. 31, 2014 Incentive Compensation Plan 2007 [Member]	Oct. 29, 2013 Incentive Compensation Plan 2007 [Member]	Nov. 13, 2007 Incentive Compensation Plan 2007 [Member]	Mar. 31, 2014 Incentive Compensation Plan 2006 [Member]	Dec. 31, 2011 Incentive Compensation Plan 2006 [Member]	Dec. 31, 2009 Incentive Compensation Plan 2006 [Member]	Sep. 30, 2006 Incentive Compensation Plan 2006 [Member]	Nov. 13, 2007 Stock appreciation rights (SARs) [Member] Incentive Compensation Plan 2007 [Member]	Oct. 29, 2013 Stock appreciation rights (SARs) [Member] Incentive Compensation Plan 2007 [Member]	Nov. 13, 2007 Restricted stock, deferred stock, performance shares and/or other stock-based awards [Member] Incentive Compensation Plan 2007 [Member]	Oct. 29, 2013 Restricted stock, deferred stock, performance shares and/or other stock-based awards [Member] Incentive Compensation Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exchange ratio				1.1533
Incentive Compensation Plan, shares authorized for issuance						4,940,000	1,000,000		3,378,189	1,110,053	80,000
Maximum number of shares that can be purchased by eligible employee												200,000	1,000,000	100,000	500,000
Stock Appreciation Rights, maximum term					10 years
Vesting period								4 years
Expiration period					10 years			10 years
Stock-based compensation expense	$ 279,000	$ 65,000
Options outstanding, aggregate intrinsic value	32,000,000
Options exercisable, aggregate intrinsic value	17,000,000
Options vested and expected to vest, aggregate intrinsic value	31,000,000
Granted in period	787,300		603,139
Weighted average fair value of stock options granted	$ 3.10		$ 0.95
Total intrinsic value of options exercised	$ 555,166		$ 347,593