Shareholders' Deficit (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 22, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common stock, shares authorized	95,000,000	95,000,000
Preferred stock authorized shares	5,000,000	5,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common shares	32,733,000	32,473,000	32,141,000
Ending balance, common shares	33,090,000	32,733,000	32,473,000
Common Stock:
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of equity awards, net	357,000	260,000	332,000
Series A Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Preferred stock authorized shares				1