Equity Transactions (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders Equity [Line Items]
Preferred stock, shares authorized	10,000	10,000
Expiration date on repurchase authorizations	Dec. 31, 2020
Common stock acquired, shares	376
Common stock acquired, cost	$ 35,786	$ 9,606	$ 1,510
Remaining authorized repurchase amount	52,316
Maximum
Stockholders Equity [Line Items]
Authorization amount for repurchase of common stock	$ 175,000