Common Stock Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2014

Common Stock Incentive Plan

Summary of common stock grant activity under the 2012 Plan

	For the three months ended				For the year ended
	March 31, 2014				December 31, 2013
			Weighted				Weighted
	Number of		average		Number of		average
	shares		price(1)		shares		price(1)
Outstanding nonvested shares, beginning of year	722,263		$	23.37	895,550		$	19.94
Shares granted	223,293		$	39.22	484,060		$	41.13
Shares vested	(269,109	)	$	35.41	(654,650	)	$	30.91
Shares forfeited	(949	)	$	39.75	(2,697	)	$	37.30
Outstanding nonvested shares, end of each period	675,498		$	33.90	722,263		$	23.37

(1) Grant date fair value.