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Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2017
Equity [Abstract]  
Reconciliation of beginning and ending common stock outstanding
Common Stock    
The following table provides a reconciliation of the beginning and ending shares of common stock outstanding for the three months ended March 31, 2017 and the year ended December 31, 2016:
 
March 31, 2017
 
December 31, 2016
Balance, beginning of period
116,416,900

 
101,517,009

Issuance of common stock
31,254

 
14,063,100

Nonvested share-based awards, net of withheld shares
63,803

 
836,791

Balance, end of period
116,511,957

 
116,416,900
Schedule of accumulated other comprehensive income (loss)
The following table represents the changes in balances of each component and the amounts reclassified out of accumulated other comprehensive loss related to the Company during the three months ended March 31, 2017 and 2016:
 
Forward-starting Interest Rate Swaps
 
(Dollars in thousands)
2017
 
2016
 
Beginning balance
$
(1,401
)
 
$
(1,569
)
 
Amounts reclassified from accumulated other comprehensive loss
43

 
42

 
Net accumulated other comprehensive income
43

 
42

 
Ending balance
$
(1,358
)
 
$
(1,527
)
 
Earnings (loss) per share
Earnings Per Common Share
The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2017 and 2016.
 
Three Months Ended March 31,
(Dollars in thousands, except per share data)
2017
 
2016
Weighted average Common Shares outstanding
 
 
 
Weighted average Common Shares outstanding
116,470,836

 
102,634,273

Nonvested shares
(1,795,752
)
 
(1,202,185
)
Weighted average Common Shares outstanding—Basic
114,675,084

 
101,432,088

Weighted average Common Shares outstanding—Basic
114,675,084

 
101,432,088

Dilutive effect of restricted stock
725,346

 
601,509

Dilutive effect of employee stock purchase plan
106,572

 
131,221

Weighted average Common Shares outstanding—Diluted
115,507,002

 
102,164,818

Net Income
 
 
 
Income from continuing operations
$
31,858

 
$
9,163

Discontinued operations
(13
)
 
(7
)
Net income
$
31,845

 
$
9,156

Basic Earnings Per Common Share
 
 
 
Income from continuing operations
$
0.28

 
$
0.09

Discontinued operations
0.00

 
0.00

Net income
$
0.28

 
$
0.09

Diluted Earnings Per Common Share
 
 
 
Income from continuing operations
$
0.28

 
$
0.09

Discontinued operations
0.00

 
0.00

Net income
$
0.28

 
$
0.09
Summary of the activity under the Incentive Plan
A summary of the activity under the stock-based incentive plans for the three months ended March 31, 2017 and 2016 is included in the table below.
 
Three Months Ended March 31,
 
2017
 
2016
Stock-based awards, beginning of period
1,786,497

 
1,092,262

Granted
80,384

 
300,206

Vested
(52,842
)
 
(65,722
)
Stock-based awards, end of period
1,814,039

 
1,326,746
Summary of employee stock purchase plan activity
A summary of the activity under the Purchase Plan for the three months ended March 31, 2017 and 2016 is included in the table below.
 
Three Months Ended March 31,
 
2017
 
2016
Outstanding and exercisable, beginning of period
316,321

 
340,958

Granted
206,824

 
198,450

Exercised
(11,435
)
 
(26,689
)
Forfeited
(13,782
)
 
(7,682
)
Expired
(132,310
)
 
(143,082
)
Outstanding and exercisable, end of period
365,618

 
361,955