Stockholders' Equity - Narrative (Details) (USD $) Share data in Thousands, unless otherwise specified	0 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 05, 2013	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Equity [Abstract]
Stock repurchase program, authorized amount	$ 200,000,000
Remaining amount for purchases under the repurchase program			75,000,000	104,500,000
Stock repurchased (in shares)		2,000		50
Stock repurchased value		$ 29,500,000		$ 800,000