Supplemental Condensed Consolidating Financial Information - Phantom (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Condensed Consolidating Financial Information [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares, issued (in shares)	69,289,348	69,636,785
Common stock, shares, outstanding (in shares)	69,289,348	69,636,785
Treasury stock, shares (in shares)	1,755,355	1,255,355	603,528