Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Segment, Discontinued Operations [Member]	Jun. 30, 2014 Performance Shares [Member]	Jun. 30, 2014 E S P P [Member]	Jun. 30, 2013 E S P P [Member]	Jun. 30, 2014 E S P P [Member]	Jun. 30, 2013 E S P P [Member]	Jun. 30, 2014 Executive Officer [Member]	Jun. 30, 2013 Executive Officer [Member]	Jun. 30, 2014 Executive Officer [Member]	Jun. 30, 2013 Executive Officer [Member]	Dec. 31, 2013 Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance										1.5		1.5
Shares available for grant	6.4		6.4							1.2		1.2
Compensation cost related to restricted shares	$ 1.8	$ 1.9	$ 3.5	$ 5.1				$ 1.3
Deferred compensation arrangement, award vesting period			3 years		3 years	3 years	5 years		3 years
Deferred compensation arrangement, cash awards granted, amount	8.9		8.9		8.4
Deferred compensation arrangement, compensation expense	3.7	1.7	5.4	4.2										1.9	0.8	2.8	2.4
Deferred compensation cash-based arrangement, liability	10.7		10.7		14.8									7.0		7.0		11.1
Percentage of share of non vested stock considered as call option	85.00%		85.00%
Percentage of share of non-vested stock considered as put-option			15.00%
Allocated share-based compensation expense										$ 0.3	$ 0.2	$ 0.5	$ 0.4