Stockholders' Equity and Stock Incentive Plans Dividends (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Dividends, Share-based Payments [Abstract]
Dividends, Share-based Compensation	$ 0.06	$ 0.06	$ 0.05	$ 0.05

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared and applicable to holders of share-based compensation, for example, but not limited to, non-vested shares, stock options, or restricted stock units.

No definition available.

Name:	us-gaap_DividendsShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration