Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended		3 Months Ended
	Aug. 05, 2019	Jul. 31, 2019	Jan. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Stock Repurchased During Period, Shares			7,862	39,320
Stock Repurchased During Period, Value			$ 0.1	$ 0.3
Common stock, shares authorized (in shares)				100,000,000		100,000,000
Common stock, par value (in dollars per share)				$ 0.01		$ 0.01
Common Stock, Shares, Issued				50,879,949	50,820,548	50,719,884	50,719,884	50,685,699	50,598,901
Common stock, shares outstanding (in shares)				50,696,011		50,583,128
Preferred stock, shares authorized (in shares)				5,000,000		5,000,000
Preferred stock, par value (in dollars per share)				$ 0.01		$ 0.01
Preferred stock, shares issued (in shares)				0		0
Preferred stock, shares outstanding (in shares)				0		0
GHO Homes [Member]
Class of Stock [Line Items]
Ownership percentage by noncontrolling owners				20.00%
Subsequent Event [Member]
Class of Stock [Line Items]
Stock Repurchased During Period, Shares		144,584
Stock Repurchased During Period, Value		$ 1.2
Stock Repurchase Program Expiration Date	Aug. 05, 2019