Note 19 - Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Quarterly Financial Information [Table Text Block]

	201 6								2015
	1Q (1)		2Q		3Q		4Q		1Q		2Q		3Q		4Q
Contract revenue	$	283,599	$	305,419	$	306,520	$	289,559	$	273,527	$	288,949	$	288,951	$	280,805
Operating income		17,694		19,358		23,776		21,965		15,962		18,734		21,497		19,038
Net income		9,891		10,583		13,437		12,673		7,900		9,174		11,545		10,750
Earnings per share:
Basic	$	0.52	$	0.56	$	0.71	$	0.67	$	0.41	$	0.47	$	0.60	$	0.56
Diluted		0.51		0.55		0.70		0.65		0.40		0.47		0.59		0.55
Weighted-average common shares outstanding (in thousands)
Basic		18,994		19,008		18,965		18,988		19,450		19,475		19,316		19,102
Diluted		19,273		19,293		19,329		19,512		19,838		19,706		19,556		19,373