Note 11 - Share Based Compensation And Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2012

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

Options	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in Years)		Aggregate Intrinsic Value
Balance of Outstanding Options at January 1, 2012		3,848,472		$	12.48
Granted		636,320			23.48
Exercised		(426,976	)		9.51
Forfeited		(20,550	)		14.83
Balance of Outstanding Options at December 31, 2012		4,037,266		$	14.52		6.13	$	26,607,758
Expected to vest after December 31, 2012		2,276,753		$	16.42		7.73	$	11,383,235
Vested and exercisable at December 31, 2012		1,613,658		$	11.74		3.75	$	14,413,812

Schedule of Nonvested Share Activity [Table Text Block]

Non-vested Shares	Number of Shares			Weighted Average Grant Date Fair Value
Non-vested at January 1, 2012		2,322,792		$	5.88
Granted		636,320			10.95
Vested		(515,920	)		4.62
Forfeited		(19,584	)		6.72
Non-vested at December 31, 2012		2,423,608		$	7.48

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

Stock Awards and Units	Shares			Weighted Average Remaining Contractual Life (in Years)		Aggregate Intrinsic Value		Weighted Average Grant Date Fair Value
Outstanding Non-vested shares at January 1, 2012		203,887						$	14.89
Granted		161,239							21.98
Vested		(133,012	)						13.70
Forfeited		–
Outstanding Non-vested at December 31, 2012		232,114			8.62	$	4,797,796	$	20.50
Expected to vest after December 31, 2012		227,066			8.62	$	4,693,454