Common and Preferred Stock - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Number of shares repurchased under the program	0	0
Repurchase program remaining authorization	$ 50,000,000
Preferred stock authorized (in shares)	10,000,000
Preferred stock outstanding (in shares)	0	0