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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2016
Equity [Abstract]  
Reconciliation of total equity
The following table provides a reconciliation of total stockholders' equity for the three months ended March 31, 2016:
(Dollars in thousands, except per share data)
Common
Stock
 
Additional
Paid-In
Capital
 
Accumulated
Other
Comprehensive
Loss
 
Cumulative
Net
Income Attributable to Common Stockholders
 
Cumulative
Dividends
 
Total
Stockholders’
Equity
Balance at December 31, 2015
$
1,015

 
$
2,461,376

 
$
(1,569
)
 
$
909,685

 
$
(2,127,760
)
 
$
1,242,747

Issuance of common stock
24

 
70,202

 

 

 

 
70,226

Common stock redemptions

 
(393
)
 

 

 

 
(393
)
Stock-based compensation
3

 
1,945

 

 

 

 
1,948

Net income

 

 

 
9,156

 

 
9,156

Reclassification of loss on forward starting interest rate swaps

 

 
42

 

 

 
42

Dividends to common stockholders ($0.30 per share)

 

 

 

 
(30,727
)
 
(30,727
)
Balance at March 31, 2016
$
1,042

 
$
2,533,130

 
$
(1,527
)
 
$
918,841

 
$
(2,158,487
)
 
$
1,292,999

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, 2016 and the year ended December 31, 2015:
 
March 31, 2016
 
December 31, 2015
Balance, beginning of period
101,517,009

 
98,828,098

Issuance of common stock
2,446,136

 
2,493,171

Nonvested share-based awards, net
286,328

 
195,740

Balance, end of period
104,249,473

 
101,517,009

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 income (loss) related to the Company during the three months ended March 31, 2016 and 2015:
 
Forward-starting Interest Rate Swaps
 
Defined Benefit Pension Plan
(Dollars in thousands)
2016
 
2015
 
2016
 
2015
Beginning balance
$
(1,569
)
 
$

 
$

 
$
(2,519
)
Other comprehensive income (loss) before reclassifications

 
(723
)
 

 

Amounts reclassified from accumulated other comprehensive loss
42

 

 

 

Net accumulated other comprehensive income (loss)
42

 
(723
)
 

 

Ending balance
$
(1,527
)
 
$
(723
)
 
$


$
(2,519
)
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, 2016 and 2015.
 
Three Months Ended March 31,
(Dollars in thousands, except per share data)
2016
 
2015
Weighted average Common Shares outstanding
 
 
 
Weighted average Common Shares outstanding
102,634,273

 
99,467,804

Nonvested shares
(1,202,185
)
 
(1,107,846
)
Weighted average Common Shares outstanding—Basic
101,432,088

 
98,359,958

Weighted average Common Shares outstanding—Basic
101,432,088

 
98,359,958

Dilutive effect of restricted stock
601,509

 
615,511

Dilutive effect of employee stock purchase plan
131,221

 
161,428

Weighted average Common Shares outstanding—Diluted
102,164,818

 
99,136,897

Net Income (Loss)
 
 
 
Income from continuing operations
$
9,163

 
$
5,049

Discontinued operations
(7
)
 
333

Net income
$
9,156

 
$
5,382

Basic Earnings Per Common Share
 
 
 
Income from continuing operations
$
0.09

 
$
0.05

Discontinued operations
0.00

 
0.00

Net income
$
0.09

 
$
0.05

Diluted Earnings Per Common Share
 
 
 
Income from continuing operations
$
0.09

 
$
0.05

Discontinued operations
0.00

 
0.00

Net income
$
0.09

 
$
0.05

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, 2016 and 2015 is included in the table below.
 
Three Months Ended March 31,
 
2016
 
2015
Stock-based awards, beginning of period
1,092,262

 
1,057,732

Granted
300,206

 
89,068

Vested
(65,722
)
 
(28,386
)
Stock-based awards, end of period
1,326,746

 
1,118,414

Summary of employee stock purchase plan activity
A summary of the activity under the Purchase Plan for the three months ended March 31, 2016 and 2015 is included in the table below.
 
Three Months Ended March 31,
 
2016
 
2015
Outstanding and exercisable, beginning of period
340,958

 
393,902

Granted
198,450

 
197,640

Exercised
(26,689
)
 
(33,046
)
Forfeited
(7,682
)
 
(20,779
)
Expired
(143,082
)
 
(158,946
)
Outstanding and exercisable, end of period
361,955

 
378,771