Note 6 - Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Shares			Weighted-average Exercise Price		Weighted-average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Balance, December 31, 2014		2,332,904		$	32.34		1.2	$	1,388
Exercised		(3,750	)		23.37
Forfeited		(808,670	)		35.63
Balance, March 31, 2015		1,520,484		$	30.62		1.6	$	3,156
Exercised		(69,600	)		23.37
Forfeited		(267,884	)		33.99
Balance, June 30, 2015		1,183,000		$	30.37		1.5	$	5,010
Exercised		(74,000	)		23.37
Forfeited		(10,600	)		36.56
Balance, September 30, 2015		1,098,400		$	30.79		1.2	$	3,148
Exercisable, September 30, 2015		1,098,400		$	30.79		1.2	$	3,148

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Units
Balance at December 31, 2014		386,465
Granted		72,900
Vested		(24,892	)
Forfeited		(7,846	)
Balance at September 30, 2015		426,627

Schedule of Tax Benefit (Short-fall) from Share-based Payment Arrangements [Table Text Block]

	Three months ended September 30,				Nine months ended September 30,
(Dollars in thousands)	2015		2014		2015			2014
Tax benefit/(short-fall) of tax deductions in excess of grant-date fair value	$	17	$	-	$	(5,602	)	$	(1,177	)
Benefit of tax deductions on grant-date fair value		275		-		6,421			1,177
Total benefit of tax deductions	$	292	$	-	$	819		$	-