Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Phantom and restricted stock issuances (in shares)	211,328	200,688	110,825
Stock options exercised (in shares)		77,334	27,619
Share repurchase (in shares)		2,250,236	1,752,454
Common stock issued upon exchange of convertible securities (in shares)	31,800
Common Stock, Dividends, Per Share, Cash Paid	$ 0.3225	$ 0.255	$ 0.250