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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock Including Additional Paid in Capital [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2016 $ 768,481 $ 47,753 $ 83,732 $ 597,454 $ 47,929 $ (12,548) $ 4,161
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income attributable to the Company 15,662 0 0 0 15,662 0 0
Other comprehensive income/ (loss), net of tax 2,311 0 0 0 0 2,311 0
Dividends paid to common shareholders (9,212) 0 0 0 (9,212) 0 0
Dividends paid to preferred shareholders (869) 0 0 0 (869) 0 0
Net Change in Noncontrolling Interests (168) 0 0 0 0 0 (168)
Net proceeds from issuance of [Abstract]              
Net proceeds from issuance of common stock 721 0 73 648 0 0 0
Issuance of shares through incentive stock grants, net of shares forfeited, canceled, or withheld for employee taxes, value 0 0 (16) 16 0 0 0
Exercise of warrants 1,876 0 260 1,616 0 0 0
Amortization of stock compensation and employee stock purchase plan 2,000 0 0 2,000 0 0 0
Stock options exercised 680 0 85 595 0 0 0
Other equity adjustments 419 0 0 419 0 0 0
Ending Balance at Mar. 31, 2017 781,901 47,753 84,134 602,748 53,510 (10,237) 3,993
Beginning Balance at Dec. 31, 2017 785,944 47,753 84,208 607,929 49,526 (8,658) 5,186
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Reclassification due to change in accounting principles 0 0 0 0 334 (334) 0
Net income attributable to the Company 22,686 0 0 0 22,686 0 0
Other comprehensive income/ (loss), net of tax (12,321) 0 0 0 0 (12,321) 0
Dividends paid to common shareholders (10,159) 0 0 0 (10,159) 0 0
Dividends paid to preferred shareholders (869) 0 0 0 (869) 0 0
Net Change in Noncontrolling Interests (361) 0 0 0 0 0 (361)
Net proceeds from issuance of [Abstract]              
Net proceeds from issuance of common stock 833 0 63 770 0 0 0
Issuance of shares through incentive stock grants, net of shares forfeited, canceled, or withheld for employee taxes, value (638) 0 (151) (487) 0 0 0
Amortization of stock compensation and employee stock purchase plan 1,730 0 0 1,730 0 0 0
Stock options exercised 669 0 74 595 0 0 0
Other equity adjustments 1,989 0 0 1,989 0 0 0
Ending Balance at Mar. 31, 2018 $ 789,503 $ 47,753 $ 84,194 $ 612,526 $ 61,518 $ (21,313) $ 4,825