Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals)	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Statement of Stockholders' Equity [Abstract]
Stock repurchased (in shares)	496,608
Shares issued for stock-based awards (in shares)	104,634
Dividends on common stock, per share (in dollars per share) | $ / shares	$ 0.53