Note 5 - Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

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

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

						Weighted-average
				Weighted-average		Remaining Contractual		Aggregate Intrinsic
	Shares			Exercise Price		Life (in years)		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
Exercisable, March 31, 2015		1,520,484		$	30.62		1.6	$	3,156

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

	Units
Balance at December 31, 2014		386,465
Granted		37,675
Vested		(16,709	)
Forfeited		(7,265	)
Balance at March 31, 2015		400,166

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

	Three months ended March 31,
(Dollars in thousands)	2015			2014
Short-fall of tax deductions in excess of grant-date fair value	$	(4,395	)	$	(1,227	)
Benefit of tax deductions on grant-date fair value		4,442			1,227
Total benefit of tax deductions	$	47		$	-