Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Stock-Based Compensation

Schedule of portion of nonvested Common Shares earned based upon achievement of compounded annual book value per share growth

Performance level	Compounded Annual Book Value Per Share Growth		Nonvested Common Shares Earned
	< 11	%	0	%
Threshold	11	%	10	%
	12	%	36	%
	13	%	61	%
	14	%	87	%
Maximum	> 15	%	100	%

Summary of nonvested Common Share and nonvested Common Share unit activity

The following table summarizes nonvested Common Share and nonvested Common Share unit activity for the six months ended June 30, 2014:

	Time and Performance- Based Share Awards			Time-Based Share Awards				Share Units
		Weighted				Weighted				Weighted
	Number of Shares	Average Grant Date Fair Value		Number of Shares		Average Grant Date Fair Value		Number of Share Units		Average Grant Date Fair Value
Outstanding at beginning of year	1,238	$	14.50	2,839		$	4.82	528		$	17.03
Granted	52	22.68		82		23.47		159		21.60
Vested	—	N/A		(1,254	)	1.77		—		N/A
Forfeited	—	N/A		(13	)	2.65		(9	)	18.04
Outstanding at June 30, 2014	1,290	14.83		1,654		8.08		678		18.09

Schedule of compensation expense, net of forfeitures, and related tax effects recognized in connection with nonvested shares

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Compensation expense	$	3,365	$	556	$	6,148	$	1,115
Income tax benefit	1,178		194		2,152		390